16191172 has 12 divisors (see below), whose sum is σ = 29566656. Its totient is φ = 7743560.

The previous prime is 16191167. The next prime is 16191179. The reversal of 16191172 is 27119161.

It is a self number, because there is not a number n which added to its sum of digits gives 16191172.

It is not an unprimeable number, because it can be changed into a prime (16191179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87904 + ... + 88087.

It is an arithmetic number, because the mean of its divisors is an integer number (2463888).

Almost surely, 2^16191172 is an apocalyptic number.

It is an amenable number.

16191172 is a deficient number, since it is larger than the sum of its proper divisors (13375484).

16191172 is a wasteful number, since it uses less digits than its factorization.

16191172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176018 (or 176016 counting only the distinct ones).

The product of its digits is 756, while the sum is 28.

The square root of 16191172 is about 4023.8255429380. The cubic root of 16191172 is about 252.9838293653.

The spelling of 16191172 in words is "sixteen million, one hundred ninety-one thousand, one hundred seventy-two".