25220004135 has 64 divisors (see below), whose sum is σ = 44252282880. Its totient is φ = 12208179200.

The previous prime is 25220004119. The next prime is 25220004143. The reversal of 25220004135 is 53140002252.

It is not a de Polignac number, because 25220004135 - 2⁴ = 25220004119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8510164 + ... + 8513126.

It is an arithmetic number, because the mean of its divisors is an integer number (691441920).

Almost surely, 2^25220004135 is an apocalyptic number.

25220004135 is a deficient number, since it is larger than the sum of its proper divisors (19032278745).

25220004135 is a wasteful number, since it uses less digits than its factorization.

25220004135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 25220004135 its reverse (53140002252), we get a palindrome (78360006387).

The spelling of 25220004135 in words is "twenty-five billion, two hundred twenty million, four thousand, one hundred thirty-five".