72157552 has 20 divisors (see below), whose sum is σ = 140137360. Its totient is φ = 35993088.

The previous prime is 72157523. The next prime is 72157559. The reversal of 72157552 is 25575127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72157559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1888 + ... + 12160.

It is an arithmetic number, because the mean of its divisors is an integer number (7006868).

Almost surely, 2^72157552 is an apocalyptic number.

It is an amenable number.

72157552 is a deficient number, since it is larger than the sum of its proper divisors (67979808).

72157552 is a wasteful number, since it uses less digits than its factorization.

72157552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10720 (or 10714 counting only the distinct ones).

The product of its digits is 24500, while the sum is 34.

The square root of 72157552 is about 8494.5601416436. The cubic root of 72157552 is about 416.3199892532.

The spelling of 72157552 in words is "seventy-two million, one hundred fifty-seven thousand, five hundred fifty-two".