55401505225 has 48 divisors (see below), whose sum is σ = 76842206784. Its totient is φ = 39272832000.

The previous prime is 55401505147. The next prime is 55401505249. The reversal of 55401505225 is 52250510455.

55401505225 is digitally balanced in base 11, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55401505225 - 2²⁵ = 55367950793 is a prime.

It is a Duffinian number.

55401505225 is strictly pandigital in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19763674 + ... + 19766476.

It is an arithmetic number, because the mean of its divisors is an integer number (1600879308).

Almost surely, 2^55401505225 is an apocalyptic number.

55401505225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55401505225 is a deficient number, since it is larger than the sum of its proper divisors (21440701559).

55401505225 is a wasteful number, since it uses less digits than its factorization.

55401505225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4618 (or 4613 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 34.

The spelling of 55401505225 in words is "fifty-five billion, four hundred one million, five hundred five thousand, two hundred twenty-five".