131645056 has 32 divisors (see below), whose sum is σ = 263184480. Its totient is φ = 65591040.

The previous prime is 131645051. The next prime is 131645069. The reversal of 131645056 is 650546131.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (131645051) 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, 38155 + ... + 41461.

It is an arithmetic number, because the mean of its divisors is an integer number (8224515).

Almost surely, 2^131645056 is an apocalyptic number.

131645056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131645056 is a deficient number, since it is larger than the sum of its proper divisors (131539424).

131645056 is an equidigital number, since it uses as much as digits as its factorization.

131645056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632 (or 3620 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 131645056 is about 11473.6679401140. The cubic root of 131645056 is about 508.7075514692.

The spelling of 131645056 in words is "one hundred thirty-one million, six hundred forty-five thousand, fifty-six".