131031478812 has 48 divisors (see below), whose sum is σ = 329479708320. Its totient is φ = 40290302208.

The previous prime is 131031478793. The next prime is 131031478819. The reversal of 131031478812 is 218874130131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131031478819) 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, 48387 + ... + 514202.

It is an arithmetic number, because the mean of its divisors is an integer number (6864160590).

Almost surely, 2^131031478812 is an apocalyptic number.

131031478812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131031478812 is an abundant number, since it is smaller than the sum of its proper divisors (198448229508).

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

131031478812 is a wasteful number, since it uses less digits than its factorization.

131031478812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564102 (or 564100 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 131031478812 in words is "one hundred thirty-one billion, thirty-one million, four hundred seventy-eight thousand, eight hundred twelve".