22556020231 has 2 divisors, whose sum is σ = 22556020232. Its totient is φ = 22556020230.

The previous prime is 22556020141. The next prime is 22556020243. The reversal of 22556020231 is 13202065522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22556020231 - 2⁹ = 22556019719 is a prime.

It is a super-2 number, since 2×22556020231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22556020231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22556020261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11278010115 + 11278010116.

It is an arithmetic number, because the mean of its divisors is an integer number (11278010116).

Almost surely, 2^22556020231 is an apocalyptic number.

22556020231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22556020231 is an equidigital number, since it uses as much as digits as its factorization.

22556020231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 22556020231 its reverse (13202065522), we get a palindrome (35758085753).

The spelling of 22556020231 in words is "twenty-two billion, five hundred fifty-six million, twenty thousand, two hundred thirty-one".