15321452520 has 64 divisors (see below), whose sum is σ = 50142939840. Its totient is φ = 3714291200.

The previous prime is 15321452501. The next prime is 15321452527. The reversal of 15321452520 is 2525412351.

It is a super-2 number, since 2×15321452520² (a number of 21 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (15321452527) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5802261 + ... + 5804900.

It is an arithmetic number, because the mean of its divisors is an integer number (783483435).

Almost surely, 2^15321452520 is an apocalyptic number.

15321452520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15321452520 is an abundant number, since it is smaller than the sum of its proper divisors (34821487320).

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

15321452520 is a wasteful number, since it uses less digits than its factorization.

15321452520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11607186 (or 11607182 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 15321452520 its reverse (2525412351), we get a palindrome (17846864871).

The spelling of 15321452520 in words is "fifteen billion, three hundred twenty-one million, four hundred fifty-two thousand, five hundred twenty".