172425523 has 2 divisors, whose sum is σ = 172425524. Its totient is φ = 172425522.

The previous prime is 172425521. The next prime is 172425529. The reversal of 172425523 is 325524271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172425523 - 2¹ = 172425521 is a prime.

Together with 172425521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (172425521) 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, 86212761 + 86212762.

It is an arithmetic number, because the mean of its divisors is an integer number (86212762).

Almost surely, 2^172425523 is an apocalyptic number.

172425523 is a deficient number, since it is larger than the sum of its proper divisors (1).

172425523 is an equidigital number, since it uses as much as digits as its factorization.

172425523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 172425523 is about 13131.0899395290. The cubic root of 172425523 is about 556.5880152702.

Adding to 172425523 its reverse (325524271), we get a palindrome (497949794).

The spelling of 172425523 in words is "one hundred seventy-two million, four hundred twenty-five thousand, five hundred twenty-three".