25513014231 has 64 divisors (see below), whose sum is σ = 41140794240. Its totient is φ = 15565455360.

The previous prime is 25513014223. The next prime is 25513014287. The reversal of 25513014231 is 13241031552.

25513014231 is a `hidden beast` number, since 2 + 5 + 513 + 0 + 142 + 3 + 1 = 666.

It is not a de Polignac number, because 25513014231 - 2³ = 25513014223 is a prime.

It is a super-2 number, since 2×25513014231² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 25513014195 and 25513014204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25513014931) 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, 2744311 + ... + 2753591.

It is an arithmetic number, because the mean of its divisors is an integer number (642824910).

Almost surely, 2^25513014231 is an apocalyptic number.

25513014231 is a deficient number, since it is larger than the sum of its proper divisors (15627780009).

25513014231 is a wasteful number, since it uses less digits than its factorization.

25513014231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9473 (or 9467 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 25513014231 its reverse (13241031552), we get a palindrome (38754045783).

It can be divided in two parts, 255130 and 14231, that added together give a square (269361 = 519²).

The spelling of 25513014231 in words is "twenty-five billion, five hundred thirteen million, fourteen thousand, two hundred thirty-one".