22512500521 has 8 divisors (see below), whose sum is σ = 25764866240. Its totient is φ = 19269208368.

The previous prime is 22512500513. The next prime is 22512500537. The reversal of 22512500521 is 12500521522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22512500521 - 2³ = 22512500513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22512500561) 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, 2263071 + ... + 2272996.

It is an arithmetic number, because the mean of its divisors is an integer number (3220608280).

Almost surely, 2^22512500521 is an apocalyptic number.

It is an amenable number.

22512500521 is a deficient number, since it is larger than the sum of its proper divisors (3252365719).

22512500521 is an equidigital number, since it uses as much as digits as its factorization.

22512500521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536783.

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 22512500521 in words is "twenty-two billion, five hundred twelve million, five hundred thousand, five hundred twenty-one".