23311212173 has 2 divisors, whose sum is σ = 23311212174. Its totient is φ = 23311212172.

The previous prime is 23311212151. The next prime is 23311212227. The reversal of 23311212173 is 37121211332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21035731369 + 2275480804 = 145037^2 + 47702^2 .

It is a cyclic number.

It is not a de Polignac number, because 23311212173 - 2²⁸ = 23042776717 is a prime.

It is a super-2 number, since 2×23311212173² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23311212373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11655606086 + 11655606087.

It is an arithmetic number, because the mean of its divisors is an integer number (11655606087).

Almost surely, 2^23311212173 is an apocalyptic number.

It is an amenable number.

23311212173 is a deficient number, since it is larger than the sum of its proper divisors (1).

23311212173 is an equidigital number, since it uses as much as digits as its factorization.

23311212173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 26.

The spelling of 23311212173 in words is "twenty-three billion, three hundred eleven million, two hundred twelve thousand, one hundred seventy-three".