25531011255231 has 16 divisors (see below), whose sum is σ = 38746250145120. Its totient is φ = 16605535775040.

The previous prime is 25531011255187. The next prime is 25531011255247. The reversal of 25531011255231 is 13255211013552.

25531011255231 is a `hidden beast` number, since 2 + 5 + 5 + 3 + 1 + 0 + 1 + 125 + 523 + 1 = 666.

It is not a de Polignac number, because 25531011255231 - 2¹¹ = 25531011253183 is a prime.

It is a super-2 number, since 2×25531011255231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25531011250231) 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, 11531620960 + ... + 11531623173.

It is an arithmetic number, because the mean of its divisors is an integer number (2421640634070).

Almost surely, 2^{25531011255231} is an apocalyptic number.

25531011255231 is a deficient number, since it is larger than the sum of its proper divisors (13215238889889).

25531011255231 is a wasteful number, since it uses less digits than its factorization.

25531011255231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23063244183 (or 23063244177 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

Adding to 25531011255231 its reverse (13255211013552), we get a palindrome (38786222268783).

The spelling of 25531011255231 in words is "twenty-five trillion, five hundred thirty-one billion, eleven million, two hundred fifty-five thousand, two hundred thirty-one".