72557975 has 36 divisors (see below), whose sum is σ = 106486488. Its totient is φ = 48888000.

The previous prime is 72557959. The next prime is 72557977. The reversal of 72557975 is 57975527.

It is not a de Polignac number, because 72557975 - 2⁴ = 72557959 is a prime.

It is a super-2 number, since 2×72557975² = 10529319472201250, 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 (72557977) 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 35 ways as a sum of consecutive naturals, for example, 74240 + ... + 75210.

It is an arithmetic number, because the mean of its divisors is an integer number (2957958).

Almost surely, 2^72557975 is an apocalyptic number.

72557975 is a deficient number, since it is larger than the sum of its proper divisors (33928513).

72557975 is a wasteful number, since it uses less digits than its factorization.

72557975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1044 counting only the distinct ones).

The product of its digits is 771750, while the sum is 47.

The square root of 72557975 is about 8518.0969118695. The cubic root of 72557975 is about 417.0886622409.

The spelling of 72557975 in words is "seventy-two million, five hundred fifty-seven thousand, nine hundred seventy-five".