130161531 has 24 divisors (see below), whose sum is σ = 184778496. Its totient is φ = 81330480.

The previous prime is 130161527. The next prime is 130161557. The reversal of 130161531 is 135161031.

It is not a de Polignac number, because 130161531 - 2² = 130161527 is a prime.

It is a super-2 number, since 2×130161531² = 33884048304527922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 130161498 and 130161507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130161131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 798456 + ... + 798618.

It is an arithmetic number, because the mean of its divisors is an integer number (7699104).

Almost surely, 2^130161531 is an apocalyptic number.

130161531 is a deficient number, since it is larger than the sum of its proper divisors (54616965).

130161531 is an equidigital number, since it uses as much as digits as its factorization.

130161531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 130161531 is about 11408.8356548773. The cubic root of 130161531 is about 506.7894312880.

The spelling of 130161531 in words is "one hundred thirty million, one hundred sixty-one thousand, five hundred thirty-one".