131191256 has 32 divisors (see below), whose sum is σ = 290196480. Its totient is φ = 54410400.

The previous prime is 131191253. The next prime is 131191259. The reversal of 131191256 is 652191131.

It is an interprime number because it is at equal distance from previous prime (131191253) and next prime (131191259).

It is a super-2 number, since 2×131191256² = 34422291301715072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131191253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36050 + ... + 39521.

It is an arithmetic number, because the mean of its divisors is an integer number (9068640).

Almost surely, 2^131191256 is an apocalyptic number.

It is an amenable number.

131191256 is an abundant number, since it is smaller than the sum of its proper divisors (159005224).

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

131191256 is a wasteful number, since it uses less digits than its factorization.

131191256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75615 (or 75611 counting only the distinct ones).

The product of its digits is 1620, while the sum is 29.

The square root of 131191256 is about 11453.8751521046. The cubic root of 131191256 is about 508.1223484422.

The spelling of 131191256 in words is "one hundred thirty-one million, one hundred ninety-one thousand, two hundred fifty-six".