172246327523 has 4 divisors (see below), whose sum is σ = 174672332208. Its totient is φ = 169820322840.

The previous prime is 172246327511. The next prime is 172246327601. The reversal of 172246327523 is 325723642271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325723642271 = 37 ⋅8803341683.

It is a cyclic number.

It is not a de Polignac number, because 172246327523 - 2¹² = 172246323427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172246327223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1213002236 + ... + 1213002377.

It is an arithmetic number, because the mean of its divisors is an integer number (43668083052).

Almost surely, 2^172246327523 is an apocalyptic number.

172246327523 is a deficient number, since it is larger than the sum of its proper divisors (2426004685).

172246327523 is an equidigital number, since it uses as much as digits as its factorization.

172246327523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426004684.

The product of its digits is 846720, while the sum is 44.

Adding to 172246327523 its reverse (325723642271), we get a palindrome (497969969794).

The spelling of 172246327523 in words is "one hundred seventy-two billion, two hundred forty-six million, three hundred twenty-seven thousand, five hundred twenty-three".