73231131 has 4 divisors (see below), whose sum is σ = 97641512. Its totient is φ = 48820752.

The previous prime is 73231127. The next prime is 73231139. The reversal of 73231131 is 13113237.

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

It is not a de Polignac number, because 73231131 - 2² = 73231127 is a prime.

It is a super-2 number, since 2×73231131² = 10725597095078322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73231098 and 73231107.

It is not an unprimeable number, because it can be changed into a prime (73231139) 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, 12205186 + ... + 12205191.

It is an arithmetic number, because the mean of its divisors is an integer number (24410378).

Almost surely, 2^73231131 is an apocalyptic number.

73231131 is a deficient number, since it is larger than the sum of its proper divisors (24410381).

73231131 is a wasteful number, since it uses less digits than its factorization.

73231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24410380.

The product of its digits is 378, while the sum is 21.

The square root of 73231131 is about 8557.5189745627. The cubic root of 73231131 is about 418.3745393434.

Adding to 73231131 its reverse (13113237), we get a palindrome (86344368).

The spelling of 73231131 in words is "seventy-three million, two hundred thirty-one thousand, one hundred thirty-one".