199545131 has 2 divisors, whose sum is σ = 199545132. Its totient is φ = 199545130.

The previous prime is 199545119. The next prime is 199545169. The reversal of 199545131 is 131545991.

It is an a-pointer prime, because the next prime (199545169) can be obtained adding 199545131 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199545131 is a prime.

It is a super-2 number, since 2×199545131² = 79636518611614322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199545191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99772565 + 99772566.

It is an arithmetic number, because the mean of its divisors is an integer number (99772566).

Almost surely, 2^199545131 is an apocalyptic number.

199545131 is a deficient number, since it is larger than the sum of its proper divisors (1).

199545131 is an equidigital number, since it uses as much as digits as its factorization.

199545131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 38.

The square root of 199545131 is about 14126.0444215640. The cubic root of 199545131 is about 584.3598627667.

The spelling of 199545131 in words is "one hundred ninety-nine million, five hundred forty-five thousand, one hundred thirty-one".