25252555251 has 16 divisors (see below), whose sum is σ = 41978274048. Its totient is φ = 13118210400.

The previous prime is 25252555231. The next prime is 25252555291. The reversal of 25252555251 is 15255525252.

It is a happy number.

It is not a de Polignac number, because 25252555251 - 2⁵ = 25252555219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25252555231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54658980 + ... + 54659441.

It is an arithmetic number, because the mean of its divisors is an integer number (2623642128).

Almost surely, 2^25252555251 is an apocalyptic number.

25252555251 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25252555251 is a deficient number, since it is larger than the sum of its proper divisors (16725718797).

25252555251 is a wasteful number, since it uses less digits than its factorization.

25252555251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109318442.

The product of its digits is 250000, while the sum is 39.

It can be divided in two parts, 25252 and 555251, that added together give a triangular number (580503 = T₁₀₇₇).

The spelling of 25252555251 in words is "twenty-five billion, two hundred fifty-two million, five hundred fifty-five thousand, two hundred fifty-one".