22402399 has 2 divisors, whose sum is σ = 22402400. Its totient is φ = 22402398.

The previous prime is 22402381. The next prime is 22402421. The reversal of 22402399 is 99320422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22402399 - 2⁷ = 22402271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22402399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22402319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11201199 + 11201200.

It is an arithmetic number, because the mean of its divisors is an integer number (11201200).

Almost surely, 2^22402399 is an apocalyptic number.

22402399 is a deficient number, since it is larger than the sum of its proper divisors (1).

22402399 is an equidigital number, since it uses as much as digits as its factorization.

22402399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 22402399 is about 4733.1172603264. The cubic root of 22402399 is about 281.9020122982.

It can be divided in two parts, 22402 and 399, that multiplied together give a palindrome (8938398).

The spelling of 22402399 in words is "twenty-two million, four hundred two thousand, three hundred ninety-nine".