172216059 has 4 divisors (see below), whose sum is σ = 229621416. Its totient is φ = 114810704.

The previous prime is 172216039. The next prime is 172216061. The reversal of 172216059 is 950612271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172216059 - 2⁸ = 172215803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172216039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28702674 + ... + 28702679.

It is an arithmetic number, because the mean of its divisors is an integer number (57405354).

Almost surely, 2^172216059 is an apocalyptic number.

172216059 is a deficient number, since it is larger than the sum of its proper divisors (57405357).

172216059 is an equidigital number, since it uses as much as digits as its factorization.

172216059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57405356.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 172216059 is about 13123.1116355840. Note that the first 3 decimals coincide. The cubic root of 172216059 is about 556.3625413160.

The spelling of 172216059 in words is "one hundred seventy-two million, two hundred sixteen thousand, fifty-nine".