25521055022 has 4 divisors (see below), whose sum is σ = 38281582536. Its totient is φ = 12760527510.

The previous prime is 25521054983. The next prime is 25521055051. The reversal of 25521055022 is 22055012552.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6380263754 + ... + 6380263757.

It is an arithmetic number, because the mean of its divisors is an integer number (9570395634).

Almost surely, 2^25521055022 is an apocalyptic number.

25521055022 is a deficient number, since it is larger than the sum of its proper divisors (12760527514).

25521055022 is a wasteful number, since it uses less digits than its factorization.

25521055022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12760527513.

The product of its (nonzero) digits is 10000, while the sum is 29.

Adding to 25521055022 its reverse (22055012552), we get a palindrome (47576067574).

The spelling of 25521055022 in words is "twenty-five billion, five hundred twenty-one million, fifty-five thousand, twenty-two".