22550918197 has 2 divisors, whose sum is σ = 22550918198. Its totient is φ = 22550918196.

The previous prime is 22550918153. The next prime is 22550918207. The reversal of 22550918197 is 79181905522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21108893521 + 1442024676 = 145289^2 + 37974^2 .

It is a cyclic number.

It is not a de Polignac number, because 22550918197 - 2⁷ = 22550918069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22550918197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22550918107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11275459098 + 11275459099.

It is an arithmetic number, because the mean of its divisors is an integer number (11275459099).

Almost surely, 2^22550918197 is an apocalyptic number.

It is an amenable number.

22550918197 is a deficient number, since it is larger than the sum of its proper divisors (1).

22550918197 is an equidigital number, since it uses as much as digits as its factorization.

22550918197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 49.

The spelling of 22550918197 in words is "twenty-two billion, five hundred fifty million, nine hundred eighteen thousand, one hundred ninety-seven".