172245911 has 2 divisors, whose sum is σ = 172245912. Its totient is φ = 172245910.

The previous prime is 172245863. The next prime is 172245943. The reversal of 172245911 is 119542271.

It is an a-pointer prime, because the next prime (172245943) can be obtained adding 172245911 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172245911 - 2⁶ = 172245847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172245511) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86122955 + 86122956.

It is an arithmetic number, because the mean of its divisors is an integer number (86122956).

Almost surely, 2^172245911 is an apocalyptic number.

172245911 is a deficient number, since it is larger than the sum of its proper divisors (1).

172245911 is an equidigital number, since it uses as much as digits as its factorization.

172245911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 32.

The square root of 172245911 is about 13124.2489689887. The cubic root of 172245911 is about 556.3946861599.

The spelling of 172245911 in words is "one hundred seventy-two million, two hundred forty-five thousand, nine hundred eleven".