72331534 has 16 divisors (see below), whose sum is σ = 120030336. Its totient is φ = 32414200.

The previous prime is 72331529. The next prime is 72331561. The reversal of 72331534 is 43513327.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21592 + ... + 24715.

It is an arithmetic number, because the mean of its divisors is an integer number (7501896).

Almost surely, 2^72331534 is an apocalyptic number.

72331534 is a deficient number, since it is larger than the sum of its proper divisors (47698802).

72331534 is a wasteful number, since it uses less digits than its factorization.

72331534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46391.

The product of its digits is 7560, while the sum is 28.

The square root of 72331534 is about 8504.7947653074. The cubic root of 72331534 is about 416.6543226921.

The spelling of 72331534 in words is "seventy-two million, three hundred thirty-one thousand, five hundred thirty-four".