172216313 has 2 divisors, whose sum is σ = 172216314. Its totient is φ = 172216312.

The previous prime is 172216259. The next prime is 172216367. The reversal of 172216313 is 313612271.

It is a balanced prime because it is at equal distance from previous prime (172216259) and next prime (172216367).

It can be written as a sum of positive squares in only one way, i.e., 142969849 + 29246464 = 11957^2 + 5408^2 .

It is a cyclic number.

It is not a de Polignac number, because 172216313 - 2¹² = 172212217 is a prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (172216013) 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 as a sum of consecutive naturals, namely, 86108156 + 86108157.

It is an arithmetic number, because the mean of its divisors is an integer number (86108157).

Almost surely, 2^172216313 is an apocalyptic number.

It is an amenable number.

172216313 is a deficient number, since it is larger than the sum of its proper divisors (1).

172216313 is an equidigital number, since it uses as much as digits as its factorization.

172216313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 26.

The square root of 172216313 is about 13123.1213131633. The cubic root of 172216313 is about 556.3628148406.

Adding to 172216313 its reverse (313612271), we get a palindrome (485828584).

The spelling of 172216313 in words is "one hundred seventy-two million, two hundred sixteen thousand, three hundred thirteen".