72531807 has 8 divisors (see below), whose sum is σ = 97268784. Its totient is φ = 48074688.

The previous prime is 72531799. The next prime is 72531817. The reversal of 72531807 is 70813527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72531807 - 2³ = 72531799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72531817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69358 + ... + 70395.

It is an arithmetic number, because the mean of its divisors is an integer number (12158598).

Almost surely, 2^72531807 is an apocalyptic number.

72531807 is a deficient number, since it is larger than the sum of its proper divisors (24736977).

72531807 is a wasteful number, since it uses less digits than its factorization.

72531807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139929.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 72531807 is about 8516.5607495045. The cubic root of 72531807 is about 417.0385152677.

The spelling of 72531807 in words is "seventy-two million, five hundred thirty-one thousand, eight hundred seven".