55725420 has 48 divisors (see below), whose sum is σ = 159667200. Its totient is φ = 14513856.

The previous prime is 55725407. The next prime is 55725421. The reversal of 55725420 is 2452755.

55725420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (55725421) 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 15 ways as a sum of consecutive naturals, for example, 8220 + ... + 13379.

It is an arithmetic number, because the mean of its divisors is an integer number (3326400).

Almost surely, 2^55725420 is an apocalyptic number.

It is an amenable number.

55725420 is an abundant number, since it is smaller than the sum of its proper divisors (103941780).

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

55725420 is a wasteful number, since it uses less digits than its factorization.

55725420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21654 (or 21652 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 30.

The square root of 55725420 is about 7464.9460815199. The cubic root of 55725420 is about 381.9599110000.

The spelling of 55725420 in words is "fifty-five million, seven hundred twenty-five thousand, four hundred twenty".