172210117 has 4 divisors (see below), whose sum is σ = 172238220. Its totient is φ = 172182016.

The previous prime is 172210063. The next prime is 172210121. The reversal of 172210117 is 711012271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 711012271 = 23 ⋅30913577.

It can be written as a sum of positive squares in 2 ways, for example, as 92179201 + 80030916 = 9601^2 + 8946^2 .

It is a cyclic number.

It is not a de Polignac number, because 172210117 - 2¹⁵ = 172177349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172210217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508 + ... + 18565.

It is an arithmetic number, because the mean of its divisors is an integer number (43059555).

Almost surely, 2^172210117 is an apocalyptic number.

It is an amenable number.

172210117 is a deficient number, since it is larger than the sum of its proper divisors (28103).

172210117 is an equidigital number, since it uses as much as digits as its factorization.

172210117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28102.

The product of its (nonzero) digits is 196, while the sum is 22.

The square root of 172210117 is about 13122.8852391538. The cubic root of 172210117 is about 556.3561424852.

Adding to 172210117 its reverse (711012271), we get a palindrome (883222388).

The spelling of 172210117 in words is "one hundred seventy-two million, two hundred ten thousand, one hundred seventeen".