199210031 has 2 divisors, whose sum is σ = 199210032. Its totient is φ = 199210030.

The previous prime is 199210009. The next prime is 199210049. The reversal of 199210031 is 130012991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199210031 - 2²² = 195015727 is a prime.

It is a super-2 number, since 2×199210031² = 79369272902041922, which contains 22 as substring.

It is equal to p_11037554 and since 199210031 and 11037554 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199210051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99605015 + 99605016.

It is an arithmetic number, because the mean of its divisors is an integer number (99605016).

Almost surely, 2^199210031 is an apocalyptic number.

199210031 is a deficient number, since it is larger than the sum of its proper divisors (1).

199210031 is an equidigital number, since it uses as much as digits as its factorization.

199210031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 199210031 is about 14114.1783678682. The cubic root of 199210031 is about 584.0325705469.

The spelling of 199210031 in words is "one hundred ninety-nine million, two hundred ten thousand, thirty-one".