131156228 has 12 divisors (see below), whose sum is σ = 262312512. Its totient is φ = 56209800.

The previous prime is 131156219. The next prime is 131156237. The reversal of 131156228 is 822651131.

It is an interprime number because it is at equal distance from previous prime (131156219) and next prime (131156237).

131156228 is an admirable number.

It is a super-2 number, since 2×131156228² = 34403912286375968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131156228.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342048 + ... + 2342103.

It is an arithmetic number, because the mean of its divisors is an integer number (21859376).

Almost surely, 2^131156228 is an apocalyptic number.

It is an amenable number.

131156228 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.

131156228 is a wasteful number, since it uses less digits than its factorization.

131156228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4684162 (or 4684160 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 131156228 is about 11452.3459605445. The cubic root of 131156228 is about 508.0771216122.

The spelling of 131156228 in words is "one hundred thirty-one million, one hundred fifty-six thousand, two hundred twenty-eight".