22217958977 has 2 divisors, whose sum is σ = 22217958978. Its totient is φ = 22217958976.

The previous prime is 22217958923. The next prime is 22217958989. The reversal of 22217958977 is 77985971222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19065810241 + 3152148736 = 138079^2 + 56144^2 .

It is a cyclic number.

It is not a de Polignac number, because 22217958977 - 2⁶ = 22217958913 is a prime.

It is a super-2 number, since 2×22217958977² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22217958907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11108979488 + 11108979489.

It is an arithmetic number, because the mean of its divisors is an integer number (11108979489).

Almost surely, 2^22217958977 is an apocalyptic number.

It is an amenable number.

22217958977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22217958977 is an equidigital number, since it uses as much as digits as its factorization.

22217958977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8890560, while the sum is 59.

The spelling of 22217958977 in words is "twenty-two billion, two hundred seventeen million, nine hundred fifty-eight thousand, nine hundred seventy-seven".