172172016 has 60 divisors (see below), whose sum is σ = 497398720. Its totient is φ = 55537920.

The previous prime is 172171981. The next prime is 172172017. The reversal of 172172016 is 610271271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172172017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14821 + ... + 23748.

Almost surely, 2^172172016 is an apocalyptic number.

172172016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172172016 is an abundant number, since it is smaller than the sum of its proper divisors (325226704).

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

172172016 is a wasteful number, since it uses less digits than its factorization.

172172016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38614 (or 38605 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 172172016 is about 13121.4334582773. The cubic root of 172172016 is about 556.3151087193.

It can be divided in two parts, 1721 and 72016, that added together give a palindrome (73737).

The spelling of 172172016 in words is "one hundred seventy-two million, one hundred seventy-two thousand, sixteen".