22856399 has 2 divisors, whose sum is σ = 22856400. Its totient is φ = 22856398.

The previous prime is 22856389. The next prime is 22856489. The reversal of 22856399 is 99365822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22856399 - 2¹² = 22852303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22856329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11428199 + 11428200.

It is an arithmetic number, because the mean of its divisors is an integer number (11428200).

Almost surely, 2^22856399 is an apocalyptic number.

22856399 is a deficient number, since it is larger than the sum of its proper divisors (1).

22856399 is an equidigital number, since it uses as much as digits as its factorization.

22856399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 22856399 is about 4780.8366422625. The cubic root of 22856399 is about 283.7936037579.

Adding to 22856399 its reverse (99365822), we get a palindrome (122222221).

The spelling of 22856399 in words is "twenty-two million, eight hundred fifty-six thousand, three hundred ninety-nine".