172205673223 has 4 divisors (see below), whose sum is σ = 172207672840. Its totient is φ = 172203673608.

The previous prime is 172205673221. The next prime is 172205673247. The reversal of 172205673223 is 322376502271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172205673223 - 2¹ = 172205673221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172205673221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864528 + ... + 1044901.

It is an arithmetic number, because the mean of its divisors is an integer number (43051918210).

Almost surely, 2^172205673223 is an apocalyptic number.

172205673223 is a deficient number, since it is larger than the sum of its proper divisors (1999617).

172205673223 is an equidigital number, since it uses as much as digits as its factorization.

172205673223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999616.

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 172205673223 in words is "one hundred seventy-two billion, two hundred five million, six hundred seventy-three thousand, two hundred twenty-three".