13531202556 has 24 divisors (see below), whose sum is σ = 31576154064. Its totient is φ = 4509922560.

The previous prime is 13531202543. The next prime is 13531202593. The reversal of 13531202556 is 65520213531.

It is a happy number.

It is a super-2 number, since 2×13531202556² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69226 + ... + 178478.

It is an arithmetic number, because the mean of its divisors is an integer number (1315673086).

Almost surely, 2^13531202556 is an apocalyptic number.

It is an amenable number.

13531202556 is an abundant number, since it is smaller than the sum of its proper divisors (18044951508).

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

13531202556 is a wasteful number, since it uses less digits than its factorization.

13531202556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119581 (or 119579 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 13531202556 in words is "thirteen billion, five hundred thirty-one million, two hundred two thousand, five hundred fifty-six".