191010166231 has 2 divisors, whose sum is σ = 191010166232. Its totient is φ = 191010166230.

The previous prime is 191010166223. The next prime is 191010166273. The reversal of 191010166231 is 132661010191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191010166231 - 2³ = 191010166223 is a prime.

It is a super-2 number, since 2×191010166231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 191010166193 and 191010166202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191010166631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95505083115 + 95505083116.

It is an arithmetic number, because the mean of its divisors is an integer number (95505083116).

Almost surely, 2^191010166231 is an apocalyptic number.

191010166231 is a deficient number, since it is larger than the sum of its proper divisors (1).

191010166231 is an equidigital number, since it uses as much as digits as its factorization.

191010166231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 191010166231 in words is "one hundred ninety-one billion, ten million, one hundred sixty-six thousand, two hundred thirty-one".