25231254113421 has 12 divisors (see below), whose sum is σ = 36689743119900. Its totient is φ = 16707944557440.

The previous prime is 25231254113353. The next prime is 25231254113437. The reversal of 25231254113421 is 12431145213252.

25231254113421 is a `hidden beast` number, since 2 + 5 + 231 + 2 + 5 + 411 + 3 + 4 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14958677846025 + 10272576267396 = 3867645^2 + 3205086^2 .

It is not a de Polignac number, because 25231254113421 - 2¹⁰ = 25231254112397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231254111421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9407625100 + ... + 9407627781.

It is an arithmetic number, because the mean of its divisors is an integer number (3057478593325).

Almost surely, 2^{25231254113421} is an apocalyptic number.

It is an amenable number.

25231254113421 is a deficient number, since it is larger than the sum of its proper divisors (11458489006479).

25231254113421 is a wasteful number, since it uses less digits than its factorization.

25231254113421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18815253036 (or 18815253033 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

Adding to 25231254113421 its reverse (12431145213252), we get a palindrome (37662399326673).

The spelling of 25231254113421 in words is "twenty-five trillion, two hundred thirty-one billion, two hundred fifty-four million, one hundred thirteen thousand, four hundred twenty-one".