72713331 has 12 divisors (see below), whose sum is σ = 105413152. Its totient is φ = 48298896.

The previous prime is 72713309. The next prime is 72713339. The reversal of 72713331 is 13331727.

It is not a de Polignac number, because 72713331 - 2⁵ = 72713299 is a prime.

It is a super-2 number, since 2×72713331² = 10574457010231122, 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 = 72713295 and 72713304.

It is not an unprimeable number, because it can be changed into a prime (72713339) 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, 12091 + ... + 17076.

Almost surely, 2^72713331 is an apocalyptic number.

72713331 is a deficient number, since it is larger than the sum of its proper divisors (32699821).

72713331 is a wasteful number, since it uses less digits than its factorization.

72713331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29450 (or 29447 counting only the distinct ones).

The product of its digits is 2646, while the sum is 27.

The square root of 72713331 is about 8527.2112088302. The cubic root of 72713331 is about 417.3861302758.

The spelling of 72713331 in words is "seventy-two million, seven hundred thirteen thousand, three hundred thirty-one".