172099816 has 32 divisors (see below), whose sum is σ = 372378240. Its totient is φ = 73038528.

The previous prime is 172099799. The next prime is 172099819. The reversal of 172099816 is 618990271.

It is not an unprimeable number, because it can be changed into a prime (172099819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9151 + ... + 20686.

It is an arithmetic number, because the mean of its divisors is an integer number (11636820).

Almost surely, 2^172099816 is an apocalyptic number.

It is an amenable number.

172099816 is an abundant number, since it is smaller than the sum of its proper divisors (200278424).

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

172099816 is a wasteful number, since it uses less digits than its factorization.

172099816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29953 (or 29949 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 172099816 is about 13118.6819459883. The cubic root of 172099816 is about 556.2373346272.

The spelling of 172099816 in words is "one hundred seventy-two million, ninety-nine thousand, eight hundred sixteen".