25512013133 has 4 divisors (see below), whose sum is σ = 26105315808. Its totient is φ = 24918710460.

The previous prime is 25512013117. The next prime is 25512013151. The reversal of 25512013133 is 33131021552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25512013133 - 2⁴ = 25512013117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25512013633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296651273 + ... + 296651358.

It is an arithmetic number, because the mean of its divisors is an integer number (6526328952).

Almost surely, 2^25512013133 is an apocalyptic number.

It is an amenable number.

25512013133 is a deficient number, since it is larger than the sum of its proper divisors (593302675).

25512013133 is an equidigital number, since it uses as much as digits as its factorization.

25512013133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593302674.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 25512013133 its reverse (33131021552), we get a palindrome (58643034685).

The spelling of 25512013133 in words is "twenty-five billion, five hundred twelve million, thirteen thousand, one hundred thirty-three".