2216172170 has 16 divisors (see below), whose sum is σ = 4126665960. Its totient is φ = 855900864.

The previous prime is 2216172169. The next prime is 2216172209. The reversal of 2216172170 is 712716122.

It can be written as a sum of positive squares in 4 ways, for example, as 1766604961 + 449567209 = 42031^2 + 21203^2 .

It is a super-2 number, since 2×2216172170² = 9822838174165017800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3820697 + ... + 3821276.

Almost surely, 2^2216172170 is an apocalyptic number.

2216172170 is a deficient number, since it is larger than the sum of its proper divisors (1910493790).

2216172170 is a wasteful number, since it uses less digits than its factorization.

2216172170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7642009.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 2216172170 is about 47076.2378488341. The cubic root of 2216172170 is about 1303.7705463544.

Adding to 2216172170 its reverse (712716122), we get a palindrome (2928888292).

The spelling of 2216172170 in words is "two billion, two hundred sixteen million, one hundred seventy-two thousand, one hundred seventy".