15321011312 has 20 divisors (see below), whose sum is σ = 29686693680. Its totient is φ = 7659929088.

The previous prime is 15321011309. The next prime is 15321011341. The reversal of 15321011312 is 21311012351.

It is a super-2 number, since 2×15321011312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253853 + ... + 308355.

It is an arithmetic number, because the mean of its divisors is an integer number (1484334684).

Almost surely, 2^15321011312 is an apocalyptic number.

It is an amenable number.

15321011312 is a deficient number, since it is larger than the sum of its proper divisors (14365682368).

15321011312 is a wasteful number, since it uses less digits than its factorization.

15321011312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72080 (or 72074 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 15321011312 its reverse (21311012351), we get a palindrome (36632023663).

The spelling of 15321011312 in words is "fifteen billion, three hundred twenty-one million, eleven thousand, three hundred twelve".