25220055 has 24 divisors (see below), whose sum is σ = 46941552. Its totient is φ = 11528832.

The previous prime is 25220033. The next prime is 25220057. The reversal of 25220055 is 55002252.

It is not a de Polignac number, because 25220055 - 2⁶ = 25219991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25220057) 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 23 ways as a sum of consecutive naturals, for example, 16422 + ... + 17891.

It is an arithmetic number, because the mean of its divisors is an integer number (1955898).

Almost surely, 2^25220055 is an apocalyptic number.

25220055 is a deficient number, since it is larger than the sum of its proper divisors (21721497).

25220055 is a wasteful number, since it uses less digits than its factorization.

25220055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34335 (or 34328 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 25220055 is about 5021.9572877515. The cubic root of 25220055 is about 293.2571951439.

The spelling of 25220055 in words is "twenty-five million, two hundred twenty thousand, fifty-five".