55121225225 has 24 divisors (see below), whose sum is σ = 74861146080. Its totient is φ = 39928400000.

The previous prime is 55121225213. The next prime is 55121225251. The reversal of 55121225225 is 52252212155.

55121225225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-55121225225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55121225191 and 55121225200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330260 + ... + 468309.

It is an arithmetic number, because the mean of its divisors is an integer number (3119214420).

Almost surely, 2^55121225225 is an apocalyptic number.

55121225225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55121225225 is a deficient number, since it is larger than the sum of its proper divisors (19739920855).

55121225225 is a wasteful number, since it uses less digits than its factorization.

55121225225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798841 (or 798836 counting only the distinct ones).

The product of its digits is 20000, while the sum is 32.

The spelling of 55121225225 in words is "fifty-five billion, one hundred twenty-one million, two hundred twenty-five thousand, two hundred twenty-five".