23171001881 has 2 divisors, whose sum is σ = 23171001882. Its totient is φ = 23171001880.

The previous prime is 23171001823. The next prime is 23171001899. The reversal of 23171001881 is 18810017132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19094817856 + 4076184025 = 138184^2 + 63845^2 .

It is a cyclic number.

It is not a de Polignac number, because 23171001881 - 2¹⁰ = 23171000857 is a prime.

It is a super-2 number, since 2×23171001881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23171004881) 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 as a sum of consecutive naturals, namely, 11585500940 + 11585500941.

It is an arithmetic number, because the mean of its divisors is an integer number (11585500941).

Almost surely, 2^23171001881 is an apocalyptic number.

It is an amenable number.

23171001881 is a deficient number, since it is larger than the sum of its proper divisors (1).

23171001881 is an equidigital number, since it uses as much as digits as its factorization.

23171001881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 32.

The spelling of 23171001881 in words is "twenty-three billion, one hundred seventy-one million, one thousand, eight hundred eighty-one".