13521002156 has 24 divisors (see below), whose sum is σ = 25059741840. Its totient is φ = 6361270272.

The previous prime is 13521002147. The next prime is 13521002177. The reversal of 13521002156 is 65120012531.

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, 284855 + ... + 328913.

It is an arithmetic number, because the mean of its divisors is an integer number (1044155910).

Almost surely, 2^13521002156 is an apocalyptic number.

It is an amenable number.

13521002156 is a deficient number, since it is larger than the sum of its proper divisors (11538739684).

13521002156 is a wasteful number, since it uses less digits than its factorization.

13521002156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48593 (or 48591 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 13521002156 its reverse (65120012531), we get a palindrome (78641014687).

The spelling of 13521002156 in words is "thirteen billion, five hundred twenty-one million, two thousand, one hundred fifty-six".