1215452010520 has 128 divisors (see below), whose sum is σ = 3001081881600. Its totient is φ = 439364262400.

The previous prime is 1215452010517. The next prime is 1215452010583. The reversal of 1215452010520 is 250102545121.

It is a super-2 number, since 2×1215452010520² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114325605 + ... + 114336235.

It is an arithmetic number, because the mean of its divisors is an integer number (23445952200).

Almost surely, 2^{1215452010520} is an apocalyptic number.

1215452010520 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 1215452010520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500540940800).

1215452010520 is an abundant number, since it is smaller than the sum of its proper divisors (1785629871080).

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

1215452010520 is a wasteful number, since it uses less digits than its factorization.

1215452010520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12169 (or 12165 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 1215452010520 its reverse (250102545121), we get a palindrome (1465554555641).

The spelling of 1215452010520 in words is "one trillion, two hundred fifteen billion, four hundred fifty-two million, ten thousand, five hundred twenty".