72143552 has 28 divisors (see below), whose sum is σ = 154173936. Its totient is φ = 33296640.

The previous prime is 72143537. The next prime is 72143579. The reversal of 72143552 is 25534127.

It is a happy number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42524 + ... + 44187.

It is an arithmetic number, because the mean of its divisors is an integer number (5506212).

Almost surely, 2^72143552 is an apocalyptic number.

It is an amenable number.

72143552 is an abundant number, since it is smaller than the sum of its proper divisors (82030384).

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

72143552 is a wasteful number, since it uses less digits than its factorization.

72143552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86736 (or 86726 counting only the distinct ones).

The product of its digits is 8400, while the sum is 29.

The square root of 72143552 is about 8493.7360448745. The cubic root of 72143552 is about 416.2930627261.

Adding to 72143552 its reverse (25534127), we get a palindrome (97677679).

The spelling of 72143552 in words is "seventy-two million, one hundred forty-three thousand, five hundred fifty-two".