172201573 has 2 divisors, whose sum is σ = 172201574. Its totient is φ = 172201572.

The previous prime is 172201571. The next prime is 172201583. The reversal of 172201573 is 375102271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157201444 + 15000129 = 12538^2 + 3873^2 .

It is a cyclic number.

It is not a de Polignac number, because 172201573 - 2¹ = 172201571 is a prime.

Together with 172201571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172201571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86100786 + 86100787.

It is an arithmetic number, because the mean of its divisors is an integer number (86100787).

Almost surely, 2^172201573 is an apocalyptic number.

It is an amenable number.

172201573 is a deficient number, since it is larger than the sum of its proper divisors (1).

172201573 is an equidigital number, since it uses as much as digits as its factorization.

172201573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 172201573 is about 13122.5596969494. The cubic root of 172201573 is about 556.3469413504.

The spelling of 172201573 in words is "one hundred seventy-two million, two hundred one thousand, five hundred seventy-three".