191097030331 has 2 divisors, whose sum is σ = 191097030332. Its totient is φ = 191097030330.

The previous prime is 191097030287. The next prime is 191097030337. The reversal of 191097030331 is 133030790191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191097030331 is a prime.

It is a super-2 number, since 2×191097030331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (191097030337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95548515165 + 95548515166.

It is an arithmetic number, because the mean of its divisors is an integer number (95548515166).

Almost surely, 2^191097030331 is an apocalyptic number.

191097030331 is a deficient number, since it is larger than the sum of its proper divisors (1).

191097030331 is an equidigital number, since it uses as much as digits as its factorization.

191097030331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15309, while the sum is 37.

The spelling of 191097030331 in words is "one hundred ninety-one billion, ninety-seven million, thirty thousand, three hundred thirty-one".