131023013 has 4 divisors (see below), whose sum is σ = 142934208. Its totient is φ = 119111820.

The previous prime is 131023007. The next prime is 131023027. The reversal of 131023013 is 310320131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310320131 = 11 ⋅28210921.

It is a cyclic number.

It is not a de Polignac number, because 131023013 - 2²⁰ = 129974437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131023033) 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, 5955581 + ... + 5955602.

It is an arithmetic number, because the mean of its divisors is an integer number (35733552).

Almost surely, 2^131023013 is an apocalyptic number.

It is an amenable number.

131023013 is a deficient number, since it is larger than the sum of its proper divisors (11911195).

131023013 is a wasteful number, since it uses less digits than its factorization.

131023013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11911194.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 131023013 is about 11446.5284256844. The cubic root of 131023013 is about 507.9050458543.

Adding to 131023013 its reverse (310320131), we get a palindrome (441343144).

The spelling of 131023013 in words is "one hundred thirty-one million, twenty-three thousand, thirteen".