2216172 has 36 divisors (see below), whose sum is σ = 6016920. Its totient is φ = 633024.

The previous prime is 2216167. The next prime is 2216197. The reversal of 2216172 is 2716122.

It is a super-2 number, since 2×2216172² = 9822836667168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1297 + ... + 2472.

2^2216172 is an apocalyptic number.

It is an amenable number.

2216172 is an abundant number, since it is smaller than the sum of its proper divisors (3800748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2216172 is a wasteful number, since it uses less digits than its factorization.

2216172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3790 (or 3781 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 2216172 is about 1488.6812956439. The cubic root of 2216172 is about 130.3770513017.

The spelling of 2216172 in words is "two million, two hundred sixteen thousand, one hundred seventy-two".