13552311531 has 16 divisors (see below), whose sum is σ = 19724981760. Its totient is φ = 8208301920.

The previous prime is 13552311527. The next prime is 13552311599. The reversal of 13552311531 is 13511325531.

It is not a de Polignac number, because 13552311531 - 2² = 13552311527 is a prime.

It is a super-2 number, since 2×13552311531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13552311631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77476 + ... + 181953.

It is an arithmetic number, because the mean of its divisors is an integer number (1232811360).

Almost surely, 2^13552311531 is an apocalyptic number.

13552311531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13552311531 is a deficient number, since it is larger than the sum of its proper divisors (6172670229).

13552311531 is a wasteful number, since it uses less digits than its factorization.

13552311531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261026.

The product of its digits is 6750, while the sum is 30.

The spelling of 13552311531 in words is "thirteen billion, five hundred fifty-two million, three hundred eleven thousand, five hundred thirty-one".