22955639 has 4 divisors (see below), whose sum is σ = 26235024. Its totient is φ = 19676256.

The previous prime is 22955609. The next prime is 22955657. The reversal of 22955639 is 93655922.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22955639 is a prime.

It is a super-2 number, since 2×22955639² = 1053922723796642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22955596 and 22955605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22955609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1639682 + ... + 1639695.

It is an arithmetic number, because the mean of its divisors is an integer number (6558756).

Almost surely, 2^22955639 is an apocalyptic number.

22955639 is a deficient number, since it is larger than the sum of its proper divisors (3279385).

22955639 is an equidigital number, since it uses as much as digits as its factorization.

22955639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279384.

The product of its digits is 145800, while the sum is 41.

The square root of 22955639 is about 4791.2043371161. The cubic root of 22955639 is about 284.2037443939.

The spelling of 22955639 in words is "twenty-two million, nine hundred fifty-five thousand, six hundred thirty-nine".