173223091231 has 2 divisors, whose sum is σ = 173223091232. Its totient is φ = 173223091230.

The previous prime is 173223091177. The next prime is 173223091241. The reversal of 173223091231 is 132190322371.

173223091231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173223091231 is a prime.

It is a super-2 number, since 2×173223091231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173223091241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86611545615 + 86611545616.

It is an arithmetic number, because the mean of its divisors is an integer number (86611545616).

Almost surely, 2^173223091231 is an apocalyptic number.

173223091231 is a deficient number, since it is larger than the sum of its proper divisors (1).

173223091231 is an equidigital number, since it uses as much as digits as its factorization.

173223091231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 173223091231 in words is "one hundred seventy-three billion, two hundred twenty-three million, ninety-one thousand, two hundred thirty-one".