1215333134400 has 672 divisors, whose sum is σ = 4976992880640. Its totient is φ = 252241920000.

The previous prime is 1215333134383. The next prime is 1215333134419. The reversal of 1215333134400 is 44313335121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 476413125 + ... + 476415675.

Almost surely, 2^{1215333134400} is an apocalyptic number.

1215333134400 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 1215333134400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2488496440320).

1215333134400 is an abundant number, since it is smaller than the sum of its proper divisors (3761659746240).

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

1215333134400 is a wasteful number, since it uses less digits than its factorization.

1215333134400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3883 (or 3868 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 1215333134400 its reverse (44313335121), we get a palindrome (1259646469521).

The spelling of 1215333134400 in words is "one trillion, two hundred fifteen billion, three hundred thirty-three million, one hundred thirty-four thousand, four hundred".