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1215030342400 = 28527241531783
BaseRepresentation
bin10001101011100101011…
…100111011001100000000
311022011012112221121121121
4101223211130323030000
5124401340231424100
62330102141002024
7153532404335200
oct21534534731400
94264175847547
101215030342400
11429322a52876
12177593253314
138a7664c8834
1442b447aa400
15219144e551a
hex11ae573b300

1215030342400 has 648 divisors, whose sum is σ = 3653384230944. Its totient is φ = 398529331200.

The previous prime is 1215030342341. The next prime is 1215030342437. The reversal of 1215030342400 is 42430305121.

It is a super-2 number, since 2×12150303424002 (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 681451909 + ... + 681453691.

It is an arithmetic number, because the mean of its divisors is an integer number (5637938628).

Almost surely, 21215030342400 is an apocalyptic number.

1215030342400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215030342400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1826692115472).

1215030342400 is an abundant number, since it is smaller than the sum of its proper divisors (2438353888544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215030342400 is a wasteful number, since it uses less digits than its factorization.

1215030342400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 1215030342400 its reverse (42430305121), we get a palindrome (1257460647521).

The spelling of 1215030342400 in words is "one trillion, two hundred fifteen billion, thirty million, three hundred forty-two thousand, four hundred".