25212210325 has 6 divisors (see below), whose sum is σ = 31263140834. Its totient is φ = 20169768240.

The previous prime is 25212210313. The next prime is 25212210343. The reversal of 25212210325 is 52301221252.

It can be written as a sum of positive squares in 3 ways, for example, as 1617407089 + 23594803236 = 40217^2 + 153606^2 .

It is not a de Polignac number, because 25212210325 - 2²⁵ = 25178655893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 1008488413 = 25212210325 / (2 + 5 + 2 + 1 + 2 + 2 + 1 + 0 + 3 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25212210325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 504244182 + ... + 504244231.

Almost surely, 2^25212210325 is an apocalyptic number.

25212210325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25212210325 is a deficient number, since it is larger than the sum of its proper divisors (6050930509).

25212210325 is a wasteful number, since it uses less digits than its factorization.

25212210325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008488423 (or 1008488418 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 25212210325 its reverse (52301221252), we get a palindrome (77513431577).

The spelling of 25212210325 in words is "twenty-five billion, two hundred twelve million, two hundred ten thousand, three hundred twenty-five".