22013239 has 2 divisors, whose sum is σ = 22013240. Its totient is φ = 22013238.

The previous prime is 22013227. The next prime is 22013273. The reversal of 22013239 is 93231022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22013239 - 2²¹ = 19916087 is a prime.

It is a super-2 number, since 2×22013239² = 969165382542242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22013209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006619 + 11006620.

It is an arithmetic number, because the mean of its divisors is an integer number (11006620).

Almost surely, 2^22013239 is an apocalyptic number.

22013239 is a deficient number, since it is larger than the sum of its proper divisors (1).

22013239 is an equidigital number, since it uses as much as digits as its factorization.

22013239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 22013239 is about 4691.8268297114. The cubic root of 22013239 is about 280.2601281565.

The spelling of 22013239 in words is "twenty-two million, thirteen thousand, two hundred thirty-nine".