199880251 has 2 divisors, whose sum is σ = 199880252. Its totient is φ = 199880250.

The previous prime is 199880183. The next prime is 199880269. The reversal of 199880251 is 152088991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199880251 - 2⁹ = 199879739 is a prime.

It is a super-2 number, since 2×199880251² = 79904229479646002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199880198 and 199880207.

It is not a weakly prime, because it can be changed into another prime (199881251) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99940125 + 99940126.

It is an arithmetic number, because the mean of its divisors is an integer number (99940126).

Almost surely, 2^199880251 is an apocalyptic number.

199880251 is a deficient number, since it is larger than the sum of its proper divisors (1).

199880251 is an equidigital number, since it uses as much as digits as its factorization.

199880251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 199880251 is about 14137.9012233075. The cubic root of 199880251 is about 584.6868082737.

The spelling of 199880251 in words is "one hundred ninety-nine million, eight hundred eighty thousand, two hundred fifty-one".