2155222 has 8 divisors (see below), whose sum is σ = 3344400. Its totient is φ = 1040424.

The previous prime is 2155207. The next prime is 2155253. The reversal of 2155222 is 2225512.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2155222.

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, 18522 + ... + 18637.

It is an arithmetic number, because the mean of its divisors is an integer number (418050).

2^2155222 is an apocalyptic number.

2155222 is a deficient number, since it is larger than the sum of its proper divisors (1189178).

2155222 is a wasteful number, since it uses less digits than its factorization.

2155222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37190.

The product of its digits is 400, while the sum is 19.

The square root of 2155222 is about 1468.0674371431. The cubic root of 2155222 is about 129.1706972496.

The spelling of 2155222 in words is "two million, one hundred fifty-five thousand, two hundred twenty-two".