131311023 has 4 divisors (see below), whose sum is σ = 175081368. Its totient is φ = 87540680.

The previous prime is 131311001. The next prime is 131311027. The reversal of 131311023 is 320113131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131311023 is a prime.

It is a super-2 number, since 2×131311023² = 34485169522613058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131310993 and 131311011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131311027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21885168 + ... + 21885173.

It is an arithmetic number, because the mean of its divisors is an integer number (43770342).

Almost surely, 2^131311023 is an apocalyptic number.

131311023 is a deficient number, since it is larger than the sum of its proper divisors (43770345).

131311023 is an equidigital number, since it uses as much as digits as its factorization.

131311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43770344.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 131311023 is about 11459.1021899624. The cubic root of 131311023 is about 508.2769262741.

Adding to 131311023 its reverse (320113131), we get a palindrome (451424154).

The spelling of 131311023 in words is "one hundred thirty-one million, three hundred eleven thousand, twenty-three".