25220261275 has 24 divisors (see below), whose sum is σ = 34206292800. Its totient is φ = 18293536800.

The previous prime is 25220261201. The next prime is 25220261279. The reversal of 25220261275 is 57216202252.

It is not a de Polignac number, because 25220261275 - 2¹⁷ = 25220130203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25220261275.

It is not an unprimeable number, because it can be changed into a prime (25220261279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16765 + ... + 225214.

It is an arithmetic number, because the mean of its divisors is an integer number (1425262200).

Almost surely, 2^25220261275 is an apocalyptic number.

25220261275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25220261275 is a deficient number, since it is larger than the sum of its proper divisors (8986031525).

25220261275 is a wasteful number, since it uses less digits than its factorization.

25220261275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242379 (or 242374 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 25220261275 in words is "twenty-five billion, two hundred twenty million, two hundred sixty-one thousand, two hundred seventy-five".