22216497881 has 2 divisors, whose sum is σ = 22216497882. Its totient is φ = 22216497880.

The previous prime is 22216497871. The next prime is 22216497911. The reversal of 22216497881 is 18879461222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19970211856 + 2246286025 = 141316^2 + 47395^2 .

It is a cyclic number.

It is not a de Polignac number, because 22216497881 - 2⁶ = 22216497817 is a prime.

It is a super-2 number, since 2×22216497881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22216497871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11108248940 + 11108248941.

It is an arithmetic number, because the mean of its divisors is an integer number (11108248941).

Almost surely, 2^22216497881 is an apocalyptic number.

It is an amenable number.

22216497881 is a deficient number, since it is larger than the sum of its proper divisors (1).

22216497881 is an equidigital number, since it uses as much as digits as its factorization.

22216497881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 50.

The spelling of 22216497881 in words is "twenty-two billion, two hundred sixteen million, four hundred ninety-seven thousand, eight hundred eighty-one".