55421125 has 8 divisors (see below), whose sum is σ = 69165720. Its totient is φ = 44336800.

The previous prime is 55421111. The next prime is 55421129. The reversal of 55421125 is 52112455.

55421125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2669956 + 52751169 = 1634^2 + 7263^2 .

It is not a de Polignac number, because 55421125 - 2¹³ = 55412933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 55421125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55421129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221560 + ... + 221809.

It is an arithmetic number, because the mean of its divisors is an integer number (8645715).

Almost surely, 2^55421125 is an apocalyptic number.

It is an amenable number.

55421125 is a deficient number, since it is larger than the sum of its proper divisors (13744595).

55421125 is an equidigital number, since it uses as much as digits as its factorization.

55421125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443384 (or 443374 counting only the distinct ones).

The product of its digits is 2000, while the sum is 25.

The square root of 55421125 is about 7444.5365873236. The cubic root of 55421125 is about 381.2633964656.

The spelling of 55421125 in words is "fifty-five million, four hundred twenty-one thousand, one hundred twenty-five".