25255252261 has 2 divisors, whose sum is σ = 25255252262. Its totient is φ = 25255252260.

The previous prime is 25255252249. The next prime is 25255252331. The reversal of 25255252261 is 16225255252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15328916100 + 9926336161 = 123810^2 + 99631^2 .

It is a cyclic number.

It is not a de Polignac number, because 25255252261 - 2¹⁷ = 25255121189 is a prime.

It is a super-2 number, since 2×25255252261² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25255252261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25255252961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12627626130 + 12627626131.

It is an arithmetic number, because the mean of its divisors is an integer number (12627626131).

Almost surely, 2^25255252261 is an apocalyptic number.

It is an amenable number.

25255252261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25255252261 is an equidigital number, since it uses as much as digits as its factorization.

25255252261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120000, while the sum is 37.

The spelling of 25255252261 in words is "twenty-five billion, two hundred fifty-five million, two hundred fifty-two thousand, two hundred sixty-one".