25211012215 has 16 divisors (see below), whose sum is σ = 30547782720. Its totient is φ = 19973332480.

The previous prime is 25211012191. The next prime is 25211012231. The reversal of 25211012215 is 51221011252.

It is a happy number.

It is not a de Polignac number, because 25211012215 - 2⁹ = 25211011703 is a prime.

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, 168495 + ... + 280735.

It is an arithmetic number, because the mean of its divisors is an integer number (1909236420).

Almost surely, 2^25211012215 is an apocalyptic number.

25211012215 is a deficient number, since it is larger than the sum of its proper divisors (5336770505).

25211012215 is a wasteful number, since it uses less digits than its factorization.

25211012215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112682.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 25211012215 its reverse (51221011252), we get a palindrome (76432023467).

The spelling of 25211012215 in words is "twenty-five billion, two hundred eleven million, twelve thousand, two hundred fifteen".