25012225135 has 4 divisors (see below), whose sum is σ = 30014670168. Its totient is φ = 20009780104.

The previous prime is 25012225123. The next prime is 25012225153. The reversal of 25012225135 is 53152221052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25012225135 is a prime.

It is a super-2 number, since 2×25012225135² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2501222509 + ... + 2501222518.

It is an arithmetic number, because the mean of its divisors is an integer number (7503667542).

Almost surely, 2^25012225135 is an apocalyptic number.

25012225135 is a deficient number, since it is larger than the sum of its proper divisors (5002445033).

25012225135 is an equidigital number, since it uses as much as digits as its factorization.

25012225135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5002445032.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 25012225135 its reverse (53152221052), we get a palindrome (78164446187).

The spelling of 25012225135 in words is "twenty-five billion, twelve million, two hundred twenty-five thousand, one hundred thirty-five".