172216715 has 16 divisors (see below), whose sum is σ = 238710240. Its totient is φ = 117880320.

The previous prime is 172216679. The next prime is 172216727. The reversal of 172216715 is 517612271.

It is not a de Polignac number, because 172216715 - 2⁸ = 172216459 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 91160 + ... + 93029.

It is an arithmetic number, because the mean of its divisors is an integer number (14919390).

Almost surely, 2^172216715 is an apocalyptic number.

172216715 is a deficient number, since it is larger than the sum of its proper divisors (66493525).

172216715 is a wasteful number, since it uses less digits than its factorization.

172216715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184222.

The product of its digits is 5880, while the sum is 32.

The square root of 172216715 is about 13123.1366296324. The cubic root of 172216715 is about 556.3632477413.

Adding to 172216715 its reverse (517612271), we get a palindrome (689828986).

The spelling of 172216715 in words is "one hundred seventy-two million, two hundred sixteen thousand, seven hundred fifteen".