25445603231 has 4 divisors (see below), whose sum is σ = 25445922864. Its totient is φ = 25445283600.

The previous prime is 25445603221. The next prime is 25445603233. The reversal of 25445603231 is 13230654452.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25445603231 - 2²⁶ = 25378494367 is a prime.

It is a super-2 number, since 2×25445603231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25445603191 and 25445603200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25445603233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65246 + ... + 234836.

It is an arithmetic number, because the mean of its divisors is an integer number (6361480716).

Almost surely, 2^25445603231 is an apocalyptic number.

25445603231 is a deficient number, since it is larger than the sum of its proper divisors (319633).

25445603231 is a wasteful number, since it uses less digits than its factorization.

25445603231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319632.

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 25445603231 in words is "twenty-five billion, four hundred forty-five million, six hundred three thousand, two hundred thirty-one".