22163639 has 2 divisors, whose sum is σ = 22163640. Its totient is φ = 22163638.

The previous prime is 22163623. The next prime is 22163641. The reversal of 22163639 is 93636122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22163639 - 2⁴ = 22163623 is a prime.

It is a super-4 number, since 4×22163639⁴ (a number of 30 digits) contains 4444 as substring.

Together with 22163641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22163039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11081819 + 11081820.

It is an arithmetic number, because the mean of its divisors is an integer number (11081820).

Almost surely, 2^22163639 is an apocalyptic number.

22163639 is a deficient number, since it is larger than the sum of its proper divisors (1).

22163639 is an equidigital number, since it uses as much as digits as its factorization.

22163639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 32.

The square root of 22163639 is about 4707.8274182472. The cubic root of 22163639 is about 280.8969493332.

The spelling of 22163639 in words is "twenty-two million, one hundred sixty-three thousand, six hundred thirty-nine".