131423031 has 12 divisors (see below), whose sum is σ = 193051560. Its totient is φ = 86130000.

The previous prime is 131423027. The next prime is 131423051. The reversal of 131423031 is 130324131.

It is not a de Polignac number, because 131423031 - 2² = 131423027 is a prime.

It is a super-2 number, since 2×131423031² = 34544026154453922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131422995 and 131423013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131423011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123220 + ... + 124281.

It is an arithmetic number, because the mean of its divisors is an integer number (16087630).

Almost surely, 2^131423031 is an apocalyptic number.

131423031 is a deficient number, since it is larger than the sum of its proper divisors (61628529).

131423031 is a wasteful number, since it uses less digits than its factorization.

131423031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247566 (or 247563 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 131423031 is about 11463.9884420737. The cubic root of 131423031 is about 508.4214048842.

Adding to 131423031 its reverse (130324131), we get a palindrome (261747162).

The spelling of 131423031 in words is "one hundred thirty-one million, four hundred twenty-three thousand, thirty-one".