55572725 has 24 divisors (see below), whose sum is σ = 74989992. Its totient is φ = 40608000.

The previous prime is 55572721. The next prime is 55572763. The reversal of 55572725 is 52727555.

It can be written as a sum of positive squares in 12 ways, for example, as 12630916 + 42941809 = 3554^2 + 6553^2 .

It is not a de Polignac number, because 55572725 - 2² = 55572721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55572721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31979 + ... + 33671.

It is an arithmetic number, because the mean of its divisors is an integer number (3124583).

Almost surely, 2^55572725 is an apocalyptic number.

It is an amenable number.

55572725 is a deficient number, since it is larger than the sum of its proper divisors (19417267).

55572725 is a wasteful number, since it uses less digits than its factorization.

55572725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817 (or 1812 counting only the distinct ones).

The product of its digits is 122500, while the sum is 38.

The square root of 55572725 is about 7454.7115973725. The cubic root of 55572725 is about 381.6107183509.

The spelling of 55572725 in words is "fifty-five million, five hundred seventy-two thousand, seven hundred twenty-five".