25532421125 has 16 divisors (see below), whose sum is σ = 33738844464. Its totient is φ = 19224409600.

The previous prime is 25532421113. The next prime is 25532421133. The reversal of 25532421125 is 52112423552.

It can be written as a sum of positive squares in 8 ways, for example, as 4155349444 + 21377071681 = 64462^2 + 146209^2 .

It is not a de Polignac number, because 25532421125 - 2⁸ = 25532420869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25532421091 and 25532421100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6005504 + ... + 6009753.

It is an arithmetic number, because the mean of its divisors is an integer number (2108677779).

Almost surely, 2^25532421125 is an apocalyptic number.

25532421125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25532421125 is a deficient number, since it is larger than the sum of its proper divisors (8206423339).

25532421125 is a wasteful number, since it uses less digits than its factorization.

25532421125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12015289 (or 12015279 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

Adding to 25532421125 its reverse (52112423552), we get a palindrome (77644844677).

The spelling of 25532421125 in words is "twenty-five billion, five hundred thirty-two million, four hundred twenty-one thousand, one hundred twenty-five".