172245133 has 2 divisors, whose sum is σ = 172245134. Its totient is φ = 172245132.

The previous prime is 172245121. The next prime is 172245187. The reversal of 172245133 is 331542271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148303684 + 23941449 = 12178^2 + 4893^2 .

It is a cyclic number.

It is not a de Polignac number, because 172245133 - 2⁹ = 172244621 is a prime.

It is equal to p_9621613 and since 172245133 and 9621613 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172245193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86122566 + 86122567.

It is an arithmetic number, because the mean of its divisors is an integer number (86122567).

Almost surely, 2^172245133 is an apocalyptic number.

It is an amenable number.

172245133 is a deficient number, since it is larger than the sum of its proper divisors (1).

172245133 is an equidigital number, since it uses as much as digits as its factorization.

172245133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 172245133 is about 13124.2193291639. The cubic root of 172245133 is about 556.3938484512.

The spelling of 172245133 in words is "one hundred seventy-two million, two hundred forty-five thousand, one hundred thirty-three".