25231613253 has 64 divisors (see below), whose sum is σ = 42514827264. Its totient is φ = 12929760000.

The previous prime is 25231613243. The next prime is 25231613261. The reversal of 25231613253 is 35231613252.

It is not a de Polignac number, because 25231613253 - 2⁶ = 25231613189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231613243) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6834138 + ... + 6837828.

It is an arithmetic number, because the mean of its divisors is an integer number (664294176).

Almost surely, 2^25231613253 is an apocalyptic number.

It is an amenable number.

25231613253 is a deficient number, since it is larger than the sum of its proper divisors (17283214011).

25231613253 is a wasteful number, since it uses less digits than its factorization.

25231613253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106.

The product of its digits is 32400, while the sum is 33.

Subtracting 25231613253 from its reverse (35231613252), we obtain a palindrome (9999999999).

The spelling of 25231613253 in words is "twenty-five billion, two hundred thirty-one million, six hundred thirteen thousand, two hundred fifty-three".