72382515 has 32 divisors (see below), whose sum is σ = 123114816. Its totient is φ = 36188160.

The previous prime is 72382511. The next prime is 72382517. The reversal of 72382515 is 51528327.

It is not a de Polignac number, because 72382515 - 2² = 72382511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72382511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94735 + ... + 95495.

It is an arithmetic number, because the mean of its divisors is an integer number (3847338).

Almost surely, 2^72382515 is an apocalyptic number.

72382515 is a deficient number, since it is larger than the sum of its proper divisors (50732301).

72382515 is a wasteful number, since it uses less digits than its factorization.

72382515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159.

The product of its digits is 16800, while the sum is 33.

The square root of 72382515 is about 8507.7914290373. The cubic root of 72382515 is about 416.7521890228.

It can be divided in two parts, 723 and 82515, that added together give a palindrome (83238).

The spelling of 72382515 in words is "seventy-two million, three hundred eighty-two thousand, five hundred fifteen".