22521244501 has 4 divisors (see below), whose sum is σ = 25738565152. Its totient is φ = 19303923852.

The previous prime is 22521244481. The next prime is 22521244511. The reversal of 22521244501 is 10544212522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22521244501 - 2⁷ = 22521244373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22521244501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22521244511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608660315 + ... + 1608660328.

It is an arithmetic number, because the mean of its divisors is an integer number (6434641288).

Almost surely, 2^22521244501 is an apocalyptic number.

It is an amenable number.

22521244501 is a deficient number, since it is larger than the sum of its proper divisors (3217320651).

22521244501 is an equidigital number, since it uses as much as digits as its factorization.

22521244501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217320650.

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 22521244501 in words is "twenty-two billion, five hundred twenty-one million, two hundred forty-four thousand, five hundred one".