25021240255 has 16 divisors (see below), whose sum is σ = 32769144864. Its totient is φ = 18189450880.

The previous prime is 25021240243. The next prime is 25021240313. The reversal of 25021240255 is 55204212052.

It is not a de Polignac number, because 25021240255 - 2²⁵ = 24987685823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33129 + ... + 226141.

It is an arithmetic number, because the mean of its divisors is an integer number (2048071554).

Almost surely, 2^25021240255 is an apocalyptic number.

25021240255 is a deficient number, since it is larger than the sum of its proper divisors (7747904609).

25021240255 is a wasteful number, since it uses less digits than its factorization.

25021240255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195386.

The product of its (nonzero) digits is 8000, while the sum is 28.

The spelling of 25021240255 in words is "twenty-five billion, twenty-one million, two hundred forty thousand, two hundred fifty-five".