25312233261 has 48 divisors (see below), whose sum is σ = 39489508800. Its totient is φ = 14379805440.

The previous prime is 25312233239. The next prime is 25312233269. The reversal of 25312233261 is 16233221352.

It is not a de Polignac number, because 25312233261 - 2⁹ = 25312232749 is a prime.

It is a super-3 number, since 3×25312233261³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25312233269) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26728390 + ... + 26729336.

It is an arithmetic number, because the mean of its divisors is an integer number (822698100).

Almost surely, 2^25312233261 is an apocalyptic number.

25312233261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25312233261 is a deficient number, since it is larger than the sum of its proper divisors (14177275539).

25312233261 is a wasteful number, since it uses less digits than its factorization.

25312233261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834 (or 1827 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The spelling of 25312233261 in words is "twenty-five billion, three hundred twelve million, two hundred thirty-three thousand, two hundred sixty-one".