22155998 has 8 divisors (see below), whose sum is σ = 35188992. Its totient is φ = 10426336.

The previous prime is 22155989. The next prime is 22156003. The reversal of 22155998 is 89955122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325790 + ... + 325857.

It is an arithmetic number, because the mean of its divisors is an integer number (4398624).

Almost surely, 2^22155998 is an apocalyptic number.

22155998 is a deficient number, since it is larger than the sum of its proper divisors (13032994).

22155998 is a wasteful number, since it uses less digits than its factorization.

22155998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651666.

The product of its digits is 64800, while the sum is 41.

The square root of 22155998 is about 4707.0158274644. The cubic root of 22155998 is about 280.8646655209.

The spelling of 22155998 in words is "twenty-two million, one hundred fifty-five thousand, nine hundred ninety-eight".