131231022 has 16 divisors (see below), whose sum is σ = 282651600. Its totient is φ = 40378752.

The previous prime is 131230999. The next prime is 131231027. The reversal of 131231022 is 220132131.

It is a super-2 number, since 2×131231022² = 34443162270328968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131230992 and 131231010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131231027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841147 + ... + 841302.

It is an arithmetic number, because the mean of its divisors is an integer number (17665725).

Almost surely, 2^131231022 is an apocalyptic number.

131231022 is an abundant number, since it is smaller than the sum of its proper divisors (151420578).

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

131231022 is a wasteful number, since it uses less digits than its factorization.

131231022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682467.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 131231022 is about 11455.6109396226. The cubic root of 131231022 is about 508.1736830426.

Adding to 131231022 its reverse (220132131), we get a palindrome (351363153).

The spelling of 131231022 in words is "one hundred thirty-one million, two hundred thirty-one thousand, twenty-two".