22255581857 has 4 divisors (see below), whose sum is σ = 22255976496. Its totient is φ = 22255187220.

The previous prime is 22255581827. The next prime is 22255581869. The reversal of 22255581857 is 75818555222.

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 22255581857 - 2¹⁰ = 22255580833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22255581827) 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, 95063 + ... + 231404.

It is an arithmetic number, because the mean of its divisors is an integer number (5563994124).

Almost surely, 2^22255581857 is an apocalyptic number.

It is an amenable number.

22255581857 is a deficient number, since it is larger than the sum of its proper divisors (394639).

22255581857 is an equidigital number, since it uses as much as digits as its factorization.

22255581857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394638.

The product of its digits is 2240000, while the sum is 50.

The spelling of 22255581857 in words is "twenty-two billion, two hundred fifty-five million, five hundred eighty-one thousand, eight hundred fifty-seven".