172212611 has 2 divisors, whose sum is σ = 172212612. Its totient is φ = 172212610.

The previous prime is 172212589. The next prime is 172212619. The reversal of 172212611 is 116212271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172212611 - 2¹⁰ = 172211587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172212619) 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 as a sum of consecutive naturals, namely, 86106305 + 86106306.

It is an arithmetic number, because the mean of its divisors is an integer number (86106306).

Almost surely, 2^172212611 is an apocalyptic number.

172212611 is a deficient number, since it is larger than the sum of its proper divisors (1).

172212611 is an equidigital number, since it uses as much as digits as its factorization.

172212611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 23.

The square root of 172212611 is about 13122.9802636444. The cubic root of 172212611 is about 556.3588282460.

Adding to 172212611 its reverse (116212271), we get a palindrome (288424882).

The spelling of 172212611 in words is "one hundred seventy-two million, two hundred twelve thousand, six hundred eleven".