22051822501 has 4 divisors (see below), whose sum is σ = 22053847500. Its totient is φ = 22049797504.

The previous prime is 22051822453. The next prime is 22051822531. The reversal of 22051822501 is 10522815022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 308845476 + 21742977025 = 17574^2 + 147455^2 .

It is a cyclic number.

It is not a de Polignac number, because 22051822501 - 2²⁹ = 21514951589 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 22051822501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22051822531) 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, 996076 + ... + 1017973.

It is an arithmetic number, because the mean of its divisors is an integer number (5513461875).

Almost surely, 2^22051822501 is an apocalyptic number.

It is an amenable number.

22051822501 is a deficient number, since it is larger than the sum of its proper divisors (2024999).

22051822501 is a wasteful number, since it uses less digits than its factorization.

22051822501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024998.

The product of its (nonzero) digits is 3200, while the sum is 28.

The spelling of 22051822501 in words is "twenty-two billion, fifty-one million, eight hundred twenty-two thousand, five hundred one".