25221522000 has 80 divisors (see below), whose sum is σ = 81314206272. Its totient is φ = 6725737600.

The previous prime is 25221521971. The next prime is 25221522043. The reversal of 25221522000 is 22512252.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×25221522000² (a number of 22 digits) contains 22 as substring.

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, 2095794 + ... + 2107793.

Almost surely, 2^25221522000 is an apocalyptic number.

25221522000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25221522000 is an abundant number, since it is smaller than the sum of its proper divisors (56092684272).

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

25221522000 is a wasteful number, since it uses less digits than its factorization.

25221522000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4203613 (or 4203597 counting only the distinct ones).

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

The spelling of 25221522000 in words is "twenty-five billion, two hundred twenty-one million, five hundred twenty-two thousand".