15531323552 has 24 divisors (see below), whose sum is σ = 30582680436. Its totient is φ = 7764293632.

The previous prime is 15531323543. The next prime is 15531323617. The reversal of 15531323552 is 25532313551.

15531323552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15287838736 + 243484816 = 123644^2 + 15604^2 .

It is a super-2 number, since 2×15531323552² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155918 + ... + 235314.

Almost surely, 2^15531323552 is an apocalyptic number.

It is an amenable number.

15531323552 is a deficient number, since it is larger than the sum of its proper divisors (15051356884).

15531323552 is an equidigital number, since it uses as much as digits as its factorization.

15531323552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85520 (or 85512 counting only the distinct ones).

The product of its digits is 67500, while the sum is 35.

The spelling of 15531323552 in words is "fifteen billion, five hundred thirty-one million, three hundred twenty-three thousand, five hundred fifty-two".