130831281 has 20 divisors (see below), whose sum is σ = 223360192. Its totient is φ = 74760408.

The previous prime is 130831273. The next prime is 130831319. The reversal of 130831281 is 182138031.

It is not a de Polignac number, because 130831281 - 2³ = 130831273 is a prime.

It is a super-2 number, since 2×130831281² = 34233648176201922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130831271) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 114805 + ... + 115938.

Almost surely, 2^130831281 is an apocalyptic number.

It is an amenable number.

130831281 is a deficient number, since it is larger than the sum of its proper divisors (92528911).

130831281 is an equidigital number, since it uses as much as digits as its factorization.

130831281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230762 (or 230753 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 130831281 is about 11438.1502438113. The cubic root of 130831281 is about 507.6571779729.

The spelling of 130831281 in words is "one hundred thirty million, eight hundred thirty-one thousand, two hundred eighty-one".