72053550 has 60 divisors (see below), whose sum is σ = 200213376. Its totient is φ = 19213200.

The previous prime is 72053519. The next prime is 72053551. The reversal of 72053550 is 5535027.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72053551) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4846 + ... + 12945.

Almost surely, 2^72053550 is an apocalyptic number.

72053550 is an abundant number, since it is smaller than the sum of its proper divisors (128159826).

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

72053550 is a wasteful number, since it uses less digits than its factorization.

72053550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17815 (or 17801 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 72053550 is about 8488.4362517486. The cubic root of 72053550 is about 416.1198765410.

Adding to 72053550 its reverse (5535027), we get a palindrome (77588577).

The spelling of 72053550 in words is "seventy-two million, fifty-three thousand, five hundred fifty".