22811 has 2 divisors, whose sum is σ = 22812. Its totient is φ = 22810.

The previous prime is 22807. The next prime is 22817. The reversal of 22811 is 11822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22811 - 2² = 22807 is a prime.

It is a Chen prime.

It is a plaindrome in base 7 and base 12.

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 22811.

It is not a weakly prime, because it can be changed into another prime (22817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11405 + 11406.

It is an arithmetic number, because the mean of its divisors is an integer number (11406).

2²²⁸¹¹ is an apocalyptic number.

22811 is a deficient number, since it is larger than the sum of its proper divisors (1).

22811 is an equidigital number, since it uses as much as digits as its factorization.

22811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32, while the sum is 14.

The square root of 22811 is about 151.0331089530. The cubic root of 22811 is about 28.3605582224.

The spelling of 22811 in words is "twenty-two thousand, eight hundred eleven".