72056155 has 16 divisors (see below), whose sum is σ = 90796320. Its totient is φ = 54819072.

The previous prime is 72056129. The next prime is 72056161. The reversal of 72056155 is 55165027.

It is a cyclic number.

It is not a de Polignac number, because 72056155 - 2¹⁵ = 72023387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6007 + ... + 13423.

It is an arithmetic number, because the mean of its divisors is an integer number (5674770).

Almost surely, 2^72056155 is an apocalyptic number.

72056155 is a deficient number, since it is larger than the sum of its proper divisors (18740165).

72056155 is a wasteful number, since it uses less digits than its factorization.

72056155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7518.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 72056155 is about 8488.5896944074. The cubic root of 72056155 is about 416.1248912336.

The spelling of 72056155 in words is "seventy-two million, fifty-six thousand, one hundred fifty-five".