25252133415521 has 4 divisors (see below), whose sum is σ = 25475603622852. Its totient is φ = 25028663208192.

The previous prime is 25252133415499. The next prime is 25252133415529. The reversal of 25252133415521 is 12551433125252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5786257055296 + 19465876360225 = 2405464^2 + 4412015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25252133415521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25252133415529) 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, 111735103496 + ... + 111735103721.

It is an arithmetic number, because the mean of its divisors is an integer number (6368900905713).

Almost surely, 2^{25252133415521} is an apocalyptic number.

It is an amenable number.

25252133415521 is a deficient number, since it is larger than the sum of its proper divisors (223470207331).

25252133415521 is a wasteful number, since it uses less digits than its factorization.

25252133415521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223470207330.

The product of its digits is 360000, while the sum is 41.

The spelling of 25252133415521 in words is "twenty-five trillion, two hundred fifty-two billion, one hundred thirty-three million, four hundred fifteen thousand, five hundred twenty-one".