72312152 has 32 divisors (see below), whose sum is σ = 156615120. Its totient is φ = 30935040.

The previous prime is 72312143. The next prime is 72312187. The reversal of 72312152 is 25121327.

It is a happy number.

It is a super-2 number, since 2×72312152² = 10458094653742208, which contains 22 as substring.

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, 22673 + ... + 25664.

Almost surely, 2^72312152 is an apocalyptic number.

It is an amenable number.

72312152 is an abundant number, since it is smaller than the sum of its proper divisors (84302968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72312152 is a wasteful number, since it uses less digits than its factorization.

72312152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48371 (or 48367 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 72312152 is about 8503.6552140829. The cubic root of 72312152 is about 416.6171037224.

Adding to 72312152 its reverse (25121327), we get a palindrome (97433479).

The spelling of 72312152 in words is "seventy-two million, three hundred twelve thousand, one hundred fifty-two".