72256319 has 4 divisors (see below), whose sum is σ = 74587200. Its totient is φ = 69925440.

The previous prime is 72256291. The next prime is 72256333. The reversal of 72256319 is 91365227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91365227 = 47 ⋅1943941.

It is a cyclic number.

It is not a de Polignac number, because 72256319 - 2²⁴ = 55479103 is a prime.

It is a super-2 number, since 2×72256319² = 10441951270859522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72256339) 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, 1165394 + ... + 1165455.

It is an arithmetic number, because the mean of its divisors is an integer number (18646800).

Almost surely, 2^72256319 is an apocalyptic number.

72256319 is a deficient number, since it is larger than the sum of its proper divisors (2330881).

72256319 is a wasteful number, since it uses less digits than its factorization.

72256319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330880.

The product of its digits is 22680, while the sum is 35.

The square root of 72256319 is about 8500.3716977553. The cubic root of 72256319 is about 416.5098512466.

The spelling of 72256319 in words is "seventy-two million, two hundred fifty-six thousand, three hundred nineteen".