16172222 has 16 divisors (see below), whose sum is σ = 26548992. Its totient is φ = 7327320.

The previous prime is 16172207. The next prime is 16172231. The reversal of 16172222 is 22227161.

It is a happy number.

It is a congruent 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, 7073 + ... + 9075.

It is an arithmetic number, because the mean of its divisors is an integer number (1659312).

Almost surely, 2^16172222 is an apocalyptic number.

16172222 is a deficient number, since it is larger than the sum of its proper divisors (10376770).

16172222 is a wasteful number, since it uses less digits than its factorization.

16172222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383.

The product of its digits is 672, while the sum is 23.

The square root of 16172222 is about 4021.4701291940. The cubic root of 16172222 is about 252.8850941804.

Adding to 16172222 its reverse (22227161), we get a palindrome (38399383).

The spelling of 16172222 in words is "sixteen million, one hundred seventy-two thousand, two hundred twenty-two".