72310131 has 8 divisors (see below), whose sum is σ = 107126160. Its totient is φ = 48206736.

The previous prime is 72310123. The next prime is 72310141. The reversal of 72310131 is 13101327.

72310131 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 72310131 - 2³ = 72310123 is a prime.

It is a super-2 number, since 2×72310131² = 10457510090474322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72310141) 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, 1339050 + ... + 1339103.

It is an arithmetic number, because the mean of its divisors is an integer number (13390770).

Almost surely, 2^72310131 is an apocalyptic number.

72310131 is a deficient number, since it is larger than the sum of its proper divisors (34816029).

72310131 is a wasteful number, since it uses less digits than its factorization.

72310131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678162 (or 2678156 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 72310131 is about 8503.5363820001. The cubic root of 72310131 is about 416.6132224430.

Adding to 72310131 its reverse (13101327), we get a palindrome (85411458).

The spelling of 72310131 in words is "seventy-two million, three hundred ten thousand, one hundred thirty-one".