22406539 has 2 divisors, whose sum is σ = 22406540. Its totient is φ = 22406538.

The previous prime is 22406537. The next prime is 22406543. The reversal of 22406539 is 93560422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22406539 - 2¹ = 22406537 is a prime.

Together with 22406537, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22406539.

It is not a weakly prime, because it can be changed into another prime (22406537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11203269 + 11203270.

It is an arithmetic number, because the mean of its divisors is an integer number (11203270).

Almost surely, 2^22406539 is an apocalyptic number.

22406539 is a deficient number, since it is larger than the sum of its proper divisors (1).

22406539 is an equidigital number, since it uses as much as digits as its factorization.

22406539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 22406539 is about 4733.5545840309. The cubic root of 22406539 is about 281.9193765463.

The spelling of 22406539 in words is "twenty-two million, four hundred six thousand, five hundred thirty-nine".