22555639 has 2 divisors, whose sum is σ = 22555640. Its totient is φ = 22555638.

The previous prime is 22555627. The next prime is 22555667. The reversal of 22555639 is 93655522.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22555639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22555598 and 22555607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22555619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11277819 + 11277820.

It is an arithmetic number, because the mean of its divisors is an integer number (11277820).

Almost surely, 2^22555639 is an apocalyptic number.

22555639 is a deficient number, since it is larger than the sum of its proper divisors (1).

22555639 is an equidigital number, since it uses as much as digits as its factorization.

22555639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 37.

The square root of 22555639 is about 4749.2777345613. The cubic root of 22555639 is about 282.5433206857.

The spelling of 22555639 in words is "twenty-two million, five hundred fifty-five thousand, six hundred thirty-nine".