131651613 has 12 divisors (see below), whose sum is σ = 192011040. Its totient is φ = 86915016.

The previous prime is 131651599. The next prime is 131651647. The reversal of 131651613 is 316156131.

131651613 is a `hidden beast` number, since 1 + 3 + 1 + 651 + 6 + 1 + 3 = 666.

It is not a de Polignac number, because 131651613 - 2⁶ = 131651549 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131658613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70083 + ... + 71936.

It is an arithmetic number, because the mean of its divisors is an integer number (16000920).

Almost surely, 2^131651613 is an apocalyptic number.

It is an amenable number.

131651613 is a deficient number, since it is larger than the sum of its proper divisors (60359427).

131651613 is a wasteful number, since it uses less digits than its factorization.

131651613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142128 (or 142125 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 131651613 is about 11473.9536777869. The cubic root of 131651613 is about 508.7159972606.

The spelling of 131651613 in words is "one hundred thirty-one million, six hundred fifty-one thousand, six hundred thirteen".