25512035251 has 4 divisors (see below), whose sum is σ = 25652985904. Its totient is φ = 25371084600.

The previous prime is 25512035239. The next prime is 25512035257. The reversal of 25512035251 is 15253021552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25512035251 - 2⁹ = 25512034739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25512035257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70475055 + ... + 70475416.

It is an arithmetic number, because the mean of its divisors is an integer number (6413246476).

Almost surely, 2^25512035251 is an apocalyptic number.

25512035251 is a deficient number, since it is larger than the sum of its proper divisors (140950653).

25512035251 is a wasteful number, since it uses less digits than its factorization.

25512035251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140950652.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 25512035251 in words is "twenty-five billion, five hundred twelve million, thirty-five thousand, two hundred fifty-one".