22643555 has 16 divisors (see below), whose sum is σ = 29736288. Its totient is φ = 16416000.

The previous prime is 22643549. The next prime is 22643563. The reversal of 22643555 is 55534622.

It is not a de Polignac number, because 22643555 - 2⁴ = 22643539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29375 + ... + 30135.

It is an arithmetic number, because the mean of its divisors is an integer number (1858518).

Almost surely, 2^22643555 is an apocalyptic number.

22643555 is a deficient number, since it is larger than the sum of its proper divisors (7092733).

22643555 is a wasteful number, since it uses less digits than its factorization.

22643555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318.

The product of its digits is 36000, while the sum is 32.

The square root of 22643555 is about 4758.5244561734. The cubic root of 22643555 is about 282.9099381704.

The spelling of 22643555 in words is "twenty-two million, six hundred forty-three thousand, five hundred fifty-five".