25221656022 has 16 divisors (see below), whose sum is σ = 51673637232. Its totient is φ = 8202164480.

The previous prime is 25221655999. The next prime is 25221656029. The reversal of 25221656022 is 22065612252.

It is a super-2 number, since 2×25221656022² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25221656029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51263283 + ... + 51263774.

It is an arithmetic number, because the mean of its divisors is an integer number (3229602327).

Almost surely, 2^25221656022 is an apocalyptic number.

25221656022 is an abundant number, since it is smaller than the sum of its proper divisors (26451981210).

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

25221656022 is a wasteful number, since it uses less digits than its factorization.

25221656022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102527103.

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 25221656022 in words is "twenty-five billion, two hundred twenty-one million, six hundred fifty-six thousand, twenty-two".