25051022220 has 96 divisors (see below), whose sum is σ = 80184158208. Its totient is φ = 5724456192.

The previous prime is 25051022219. The next prime is 25051022257. The reversal of 25051022220 is 2222015052.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2900829 + ... + 2909451.

It is an arithmetic number, because the mean of its divisors is an integer number (835251648).

Almost surely, 2^25051022220 is an apocalyptic number.

25051022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25051022220 is an abundant number, since it is smaller than the sum of its proper divisors (55133135988).

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

25051022220 is a wasteful number, since it uses less digits than its factorization.

25051022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15559 (or 15557 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 25051022220 its reverse (2222015052), we get a palindrome (27273037272).

The spelling of 25051022220 in words is "twenty-five billion, fifty-one million, twenty-two thousand, two hundred twenty".