131000031 has 16 divisors (see below), whose sum is σ = 194400000. Its totient is φ = 87186744.

The previous prime is 131000021. The next prime is 131000057. The reversal of 131000031 is 130000131.

It is not a de Polignac number, because 131000031 - 2⁷ = 130999903 is a prime.

It is a super-2 number, since 2×131000031² = 34322016244001922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 130999977 and 131000022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131000021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13720 + ... + 21218.

It is an arithmetic number, because the mean of its divisors is an integer number (12150000).

Almost surely, 2^131000031 is an apocalyptic number.

131000031 is a deficient number, since it is larger than the sum of its proper divisors (63399969).

131000031 is an equidigital number, since it uses as much as digits as its factorization.

131000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8155 (or 8149 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 9.

The square root of 131000031 is about 11445.5244965008. The cubic root of 131000031 is about 507.8753478747.

Adding to 131000031 its reverse (130000131), we get a palindrome (261000162).

The spelling of 131000031 in words is "one hundred thirty-one million, thirty-one", and thus it is an aban number.