13156556 has 12 divisors (see below), whose sum is σ = 26313168. Its totient is φ = 5638512.

The previous prime is 13156553. The next prime is 13156597. The reversal of 13156556 is 65565131.

13156556 is an admirable number.

It is a super-2 number, since 2×13156556² = 346189931562272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13156553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234911 + ... + 234966.

It is an arithmetic number, because the mean of its divisors is an integer number (2192764).

Almost surely, 2^13156556 is an apocalyptic number.

It is an amenable number.

13156556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13156556 is a wasteful number, since it uses less digits than its factorization.

13156556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469888 (or 469886 counting only the distinct ones).

The product of its digits is 13500, while the sum is 32.

The square root of 13156556 is about 3627.1967137171. The cubic root of 13156556 is about 236.0735909541.

The spelling of 13156556 in words is "thirteen million, one hundred fifty-six thousand, five hundred fifty-six".