22165439 has 2 divisors, whose sum is σ = 22165440. Its totient is φ = 22165438.

The previous prime is 22165411. The next prime is 22165447. The reversal of 22165439 is 93456122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22165439 - 2¹² = 22161343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22165459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11082719 + 11082720.

It is an arithmetic number, because the mean of its divisors is an integer number (11082720).

Almost surely, 2^22165439 is an apocalyptic number.

22165439 is a deficient number, since it is larger than the sum of its proper divisors (1).

22165439 is an equidigital number, since it uses as much as digits as its factorization.

22165439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 22165439 is about 4708.0185853499. The cubic root of 22165439 is about 280.9045533917.

The spelling of 22165439 in words is "twenty-two million, one hundred sixty-five thousand, four hundred thirty-nine".