131645136 has 40 divisors (see below), whose sum is σ = 388667584. Its totient is φ = 37612800.

The previous prime is 131645131. The next prime is 131645141. The reversal of 131645136 is 631546131.

It is an interprime number because it is at equal distance from previous prime (131645131) and next prime (131645141).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131645131) 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, 195565 + ... + 196236.

Almost surely, 2^131645136 is an apocalyptic number.

131645136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131645136 is an abundant number, since it is smaller than the sum of its proper divisors (257022448).

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

131645136 is a wasteful number, since it uses less digits than its factorization.

131645136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391819 (or 391813 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 131645136 is about 11473.6714263570. The cubic root of 131645136 is about 508.7076545155.

The spelling of 131645136 in words is "one hundred thirty-one million, six hundred forty-five thousand, one hundred thirty-six".