22621279 has 2 divisors, whose sum is σ = 22621280. Its totient is φ = 22621278.

The previous prime is 22621253. The next prime is 22621283. The reversal of 22621279 is 97212622.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22621279 - 2¹⁷ = 22490207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22621279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22621979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11310639 + 11310640.

It is an arithmetic number, because the mean of its divisors is an integer number (11310640).

Almost surely, 2^22621279 is an apocalyptic number.

22621279 is a deficient number, since it is larger than the sum of its proper divisors (1).

22621279 is an equidigital number, since it uses as much as digits as its factorization.

22621279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 22621279 is about 4756.1832386905. The cubic root of 22621279 is about 282.8171351702.

The spelling of 22621279 in words is "twenty-two million, six hundred twenty-one thousand, two hundred seventy-nine".