72115575 has 24 divisors (see below), whose sum is σ = 136265088. Its totient is φ = 32966880.

The previous prime is 72115529. The next prime is 72115591. The reversal of 72115575 is 57551127.

It is not a de Polignac number, because 72115575 - 2⁸ = 72115319 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68157 + ... + 69206.

It is an arithmetic number, because the mean of its divisors is an integer number (5677712).

Almost surely, 2^72115575 is an apocalyptic number.

72115575 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

72115575 is a deficient number, since it is larger than the sum of its proper divisors (64149513).

72115575 is a wasteful number, since it uses less digits than its factorization.

72115575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137383 (or 137378 counting only the distinct ones).

The product of its digits is 12250, while the sum is 33.

The square root of 72115575 is about 8492.0889656197. The cubic root of 72115575 is about 416.2392434703.

The spelling of 72115575 in words is "seventy-two million, one hundred fifteen thousand, five hundred seventy-five".