22712861 has 2 divisors, whose sum is σ = 22712862. Its totient is φ = 22712860.

The previous prime is 22712843. The next prime is 22712873. The reversal of 22712861 is 16821722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22231225 + 481636 = 4715^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 22712861 - 2¹⁴ = 22696477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22712881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11356430 + 11356431.

It is an arithmetic number, because the mean of its divisors is an integer number (11356431).

Almost surely, 2^22712861 is an apocalyptic number.

It is an amenable number.

22712861 is a deficient number, since it is larger than the sum of its proper divisors (1).

22712861 is an equidigital number, since it uses as much as digits as its factorization.

22712861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 29.

The square root of 22712861 is about 4765.8011918249. The cubic root of 22712861 is about 283.1982819661.

The spelling of 22712861 in words is "twenty-two million, seven hundred twelve thousand, eight hundred sixty-one".