72915255 has 128 divisors (see below), whose sum is σ = 162201600. Its totient is φ = 30326400.

The previous prime is 72915239. The next prime is 72915259. The reversal of 72915255 is 55251927.

It is not a de Polignac number, because 72915255 - 2⁴ = 72915239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72915259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 556540 + ... + 556670.

It is an arithmetic number, because the mean of its divisors is an integer number (1267200).

Almost surely, 2^72915255 is an apocalyptic number.

72915255 is an abundant number, since it is smaller than the sum of its proper divisors (89286345).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72915255 is a wasteful number, since it uses less digits than its factorization.

72915255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 196 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 72915255 is about 8539.0429791634. The cubic root of 72915255 is about 417.7721318561.

The spelling of 72915255 in words is "seventy-two million, nine hundred fifteen thousand, two hundred fifty-five".