55372572 has 120 divisors (see below), whose sum is σ = 154492800. Its totient is φ = 17262720.

The previous prime is 55372549. The next prime is 55372573. The reversal of 55372572 is 27527355.

It is a happy number.

55372572 is a `hidden beast` number, since 55 + 37 + 2 + 572 = 666.

It is a super-2 number, since 2×55372572² = 6132243459790368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55372573) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 371554 + ... + 371702.

It is an arithmetic number, because the mean of its divisors is an integer number (1287440).

Almost surely, 2^55372572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55372572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77246400).

55372572 is an abundant number, since it is smaller than the sum of its proper divisors (99120228).

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

55372572 is a wasteful number, since it uses less digits than its factorization.

55372572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 222 counting only the distinct ones).

The product of its digits is 73500, while the sum is 36.

The square root of 55372572 is about 7441.2748907697. The cubic root of 55372572 is about 381.1520256352.

The spelling of 55372572 in words is "fifty-five million, three hundred seventy-two thousand, five hundred seventy-two".