130831731 has 12 divisors (see below), whose sum is σ = 195496080. Its totient is φ = 84213360.

The previous prime is 130831721. The next prime is 130831759. The reversal of 130831731 is 137138031.

It is not a de Polignac number, because 130831731 - 2⁵ = 130831699 is a prime.

It is a super-2 number, since 2×130831731² = 34233883672912722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 130831695 and 130831704.

It is not an unprimeable number, because it can be changed into a prime (130831721) 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, 250375 + ... + 250896.

It is an arithmetic number, because the mean of its divisors is an integer number (16291340).

Almost surely, 2^130831731 is an apocalyptic number.

130831731 is a deficient number, since it is larger than the sum of its proper divisors (64664349).

130831731 is a wasteful number, since it uses less digits than its factorization.

130831731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501306 (or 501303 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 130831731 is about 11438.1699148072. The cubic root of 130831731 is about 507.6577600087.

Adding to 130831731 its reverse (137138031), we get a palindrome (267969762).

The spelling of 130831731 in words is "one hundred thirty million, eight hundred thirty-one thousand, seven hundred thirty-one".