22565621551 has 8 divisors (see below), whose sum is σ = 26065103184. Its totient is φ = 19307483520.

The previous prime is 22565621537. The next prime is 22565621569. The reversal of 22565621551 is 15512656522.

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 22565621551 - 2⁷ = 22565621423 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 (22565621581) 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, 60335700 + ... + 60336073.

It is an arithmetic number, because the mean of its divisors is an integer number (3258137898).

Almost surely, 2^22565621551 is an apocalyptic number.

22565621551 is a deficient number, since it is larger than the sum of its proper divisors (3499481633).

22565621551 is a wasteful number, since it uses less digits than its factorization.

22565621551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120671801.

The product of its digits is 180000, while the sum is 40.

The spelling of 22565621551 in words is "twenty-two billion, five hundred sixty-five million, six hundred twenty-one thousand, five hundred fifty-one".