22213561691 has 2 divisors, whose sum is σ = 22213561692. Its totient is φ = 22213561690.

The previous prime is 22213561687. The next prime is 22213561693. The reversal of 22213561691 is 19616531222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22213561691 - 2² = 22213561687 is a prime.

It is a super-3 number, since 3×22213561691³ (a number of 32 digits) contains 333 as substring.

Together with 22213561693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22213561693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106780845 + 11106780846.

It is an arithmetic number, because the mean of its divisors is an integer number (11106780846).

Almost surely, 2^22213561691 is an apocalyptic number.

22213561691 is a deficient number, since it is larger than the sum of its proper divisors (1).

22213561691 is an equidigital number, since it uses as much as digits as its factorization.

22213561691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The spelling of 22213561691 in words is "twenty-two billion, two hundred thirteen million, five hundred sixty-one thousand, six hundred ninety-one".