25624023231 has 8 divisors (see below), whose sum is σ = 34959907840. Its totient is φ = 16685410392.

The previous prime is 25624023199. The next prime is 25624023239. The reversal of 25624023231 is 13232042652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25624023231 - 2⁵ = 25624023199 is a prime.

It is a super-4 number, since 4×25624023231⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25624023239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99317791 + ... + 99318048.

It is an arithmetic number, because the mean of its divisors is an integer number (4369988480).

Almost surely, 2^25624023231 is an apocalyptic number.

25624023231 is a deficient number, since it is larger than the sum of its proper divisors (9335884609).

25624023231 is a wasteful number, since it uses less digits than its factorization.

25624023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198635885.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 25624023231 its reverse (13232042652), we get a palindrome (38856065883).

The spelling of 25624023231 in words is "twenty-five billion, six hundred twenty-four million, twenty-three thousand, two hundred thirty-one".