199245131 has 2 divisors, whose sum is σ = 199245132. Its totient is φ = 199245130.

The previous prime is 199245127. The next prime is 199245239. The reversal of 199245131 is 131542991.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199245131 - 2² = 199245127 is a prime.

It is a super-2 number, since 2×199245131² = 79397244454414322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 199245091 and 199245100.

It is not a weakly prime, because it can be changed into another prime (199245331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99622565 + 99622566.

It is an arithmetic number, because the mean of its divisors is an integer number (99622566).

Almost surely, 2^199245131 is an apocalyptic number.

199245131 is a deficient number, since it is larger than the sum of its proper divisors (1).

199245131 is an equidigital number, since it uses as much as digits as its factorization.

199245131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 35.

The square root of 199245131 is about 14115.4217436108. The cubic root of 199245131 is about 584.0668699231.

The spelling of 199245131 in words is "one hundred ninety-nine million, two hundred forty-five thousand, one hundred thirty-one".