131031012 has 24 divisors (see below), whose sum is σ = 349416256. Its totient is φ = 37437408.

The previous prime is 131031007. The next prime is 131031013. The reversal of 131031012 is 210130131.

It is a super-2 number, since 2×131031012² = 34338252211488288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (131031013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 779863 + ... + 780030.

Almost surely, 2^131031012 is an apocalyptic number.

131031012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131031012 is an abundant number, since it is smaller than the sum of its proper divisors (218385244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131031012 is a wasteful number, since it uses less digits than its factorization.

131031012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559907 (or 1559905 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 131031012 is about 11446.8778276000. The cubic root of 131031012 is about 507.9153815699.

Adding to 131031012 its reverse (210130131), we get a palindrome (341161143).

The spelling of 131031012 in words is "one hundred thirty-one million, thirty-one thousand, twelve".