22515745423 has 4 divisors (see below), whose sum is σ = 22533214320. Its totient is φ = 22498276528.

The previous prime is 22515745397. The next prime is 22515745433. The reversal of 22515745423 is 32454751522.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22515745423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22515745433) 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, 8732515 + ... + 8735092.

It is an arithmetic number, because the mean of its divisors is an integer number (5633303580).

Almost surely, 2^22515745423 is an apocalyptic number.

22515745423 is a deficient number, since it is larger than the sum of its proper divisors (17468897).

22515745423 is a wasteful number, since it uses less digits than its factorization.

22515745423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17468896.

The product of its digits is 336000, while the sum is 40.

The spelling of 22515745423 in words is "twenty-two billion, five hundred fifteen million, seven hundred forty-five thousand, four hundred twenty-three".