231098935181 has 2 divisors, whose sum is σ = 231098935182. Its totient is φ = 231098935180.

The previous prime is 231098935159. The next prime is 231098935211. The reversal of 231098935181 is 181539890132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138525396100 + 92573539081 = 372190^2 + 304259^2 .

It is a cyclic number.

It is not a de Polignac number, because 231098935181 - 2¹⁸ = 231098673037 is a prime.

It is a super-2 number, since 2×231098935181² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231098935121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115549467590 + 115549467591.

It is an arithmetic number, because the mean of its divisors is an integer number (115549467591).

Almost surely, 2^231098935181 is an apocalyptic number.

It is an amenable number.

231098935181 is a deficient number, since it is larger than the sum of its proper divisors (1).

231098935181 is an equidigital number, since it uses as much as digits as its factorization.

231098935181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 50.

The spelling of 231098935181 in words is "two hundred thirty-one billion, ninety-eight million, nine hundred thirty-five thousand, one hundred eighty-one".