130731831 has 24 divisors (see below), whose sum is σ = 192600096. Its totient is φ = 85432320.

The previous prime is 130731817. The next prime is 130731857. The reversal of 130731831 is 138137031.

It is not a de Polignac number, because 130731831 - 2¹⁴ = 130715447 is a prime.

It is a super-2 number, since 2×130731831² = 34181623273225122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 130731795 and 130731804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130731871) 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, 126286 + ... + 127316.

It is an arithmetic number, because the mean of its divisors is an integer number (8025004).

Almost surely, 2^130731831 is an apocalyptic number.

130731831 is a deficient number, since it is larger than the sum of its proper divisors (61868265).

130731831 is a wasteful number, since it uses less digits than its factorization.

130731831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303 (or 1300 counting only the distinct ones).

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

The square root of 130731831 is about 11433.8021235283. The cubic root of 130731831 is about 507.5285153075.

Adding to 130731831 its reverse (138137031), we get a palindrome (268868862).

The spelling of 130731831 in words is "one hundred thirty million, seven hundred thirty-one thousand, eight hundred thirty-one".