72531375 has 32 divisors (see below), whose sum is σ = 137938944. Its totient is φ = 33156000.

The previous prime is 72531373. The next prime is 72531377. The reversal of 72531375 is 57313527.

It is an interprime number because it is at equal distance from previous prime (72531373) and next prime (72531377).

It is not a de Polignac number, because 72531375 - 2¹ = 72531373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72531373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11191 + ... + 16440.

It is an arithmetic number, because the mean of its divisors is an integer number (4310592).

Almost surely, 2^72531375 is an apocalyptic number.

72531375 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

72531375 is a deficient number, since it is larger than the sum of its proper divisors (65407569).

72531375 is a wasteful number, since it uses less digits than its factorization.

72531375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27656 (or 27646 counting only the distinct ones).

The product of its digits is 22050, while the sum is 33.

The square root of 72531375 is about 8516.5353871161. The cubic root of 72531375 is about 417.0376873046.

The spelling of 72531375 in words is "seventy-two million, five hundred thirty-one thousand, three hundred seventy-five".