21922583 has 2 divisors, whose sum is σ = 21922584. Its totient is φ = 21922582.

The previous prime is 21922573. The next prime is 21922597. The reversal of 21922583 is 38522912.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21922583 - 2²² = 17728279 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 (21922513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10961291 + 10961292.

It is an arithmetic number, because the mean of its divisors is an integer number (10961292).

Almost surely, 2^21922583 is an apocalyptic number.

21922583 is a deficient number, since it is larger than the sum of its proper divisors (1).

21922583 is an equidigital number, since it uses as much as digits as its factorization.

21922583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 21922583 is about 4682.1558068907. The cubic root of 21922583 is about 279.8748718113.

The spelling of 21922583 in words is "twenty-one million, nine hundred twenty-two thousand, five hundred eighty-three".