25212042135 has 144 divisors (see below), whose sum is σ = 52969932288. Its totient is φ = 10864022400.

The previous prime is 25212042113. The next prime is 25212042139. The reversal of 25212042135 is 53124021252.

25212042135 is a `hidden beast` number, since 2 + 521 + 2 + 0 + 4 + 2 + 135 = 666.

It is not a de Polignac number, because 25212042135 - 2⁵ = 25212042103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25212042099 and 25212042108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25212042139) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11830020 + ... + 11832150.

It is an arithmetic number, because the mean of its divisors is an integer number (367846752).

Almost surely, 2^25212042135 is an apocalyptic number.

25212042135 is an abundant number, since it is smaller than the sum of its proper divisors (27757890153).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25212042135 is a wasteful number, since it uses less digits than its factorization.

25212042135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266 (or 2240 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 25212042135 its reverse (53124021252), we get a palindrome (78336063387).

The spelling of 25212042135 in words is "twenty-five billion, two hundred twelve million, forty-two thousand, one hundred thirty-five".