72856351 has 4 divisors (see below), whose sum is σ = 72955152. Its totient is φ = 72757552.

The previous prime is 72856337. The next prime is 72856391. The reversal of 72856351 is 15365827.

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

It is a cyclic number.

It is not a de Polignac number, because 72856351 - 2²⁵ = 39301919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72856351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72856391) 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, 48286 + ... + 49771.

It is an arithmetic number, because the mean of its divisors is an integer number (18238788).

Almost surely, 2^72856351 is an apocalyptic number.

72856351 is a deficient number, since it is larger than the sum of its proper divisors (98801).

72856351 is an equidigital number, since it uses as much as digits as its factorization.

72856351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98800.

The product of its digits is 50400, while the sum is 37.

The square root of 72856351 is about 8535.5931838391. The cubic root of 72856351 is about 417.6596036012.

The spelling of 72856351 in words is "seventy-two million, eight hundred fifty-six thousand, three hundred fifty-one".