25331400225 has 18 divisors (see below), whose sum is σ = 45371352806. Its totient is φ = 13510080000.

The previous prime is 25331400161. The next prime is 25331400251. The reversal of 25331400225 is 52200413352.

It is a happy number.

25331400225 is a `hidden beast` number, since 2 + 5 + 3 + 31 + 400 + 225 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 434347281 + 24897052944 = 20841^2 + 157788^2 .

It is not a de Polignac number, because 25331400225 - 2⁶ = 25331400161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 56291776 + ... + 56292225.

Almost surely, 2^25331400225 is an apocalyptic number.

25331400225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25331400225 is a deficient number, since it is larger than the sum of its proper divisors (20039952581).

25331400225 is a wasteful number, since it uses less digits than its factorization.

25331400225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112584017 (or 112584009 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 25331400225 its reverse (52200413352), we get a palindrome (77531813577).

The spelling of 25331400225 in words is "twenty-five billion, three hundred thirty-one million, four hundred thousand, two hundred twenty-five".