199487331 has 12 divisors (see below), whose sum is σ = 290793360. Its totient is φ = 131770800.

The previous prime is 199487329. The next prime is 199487371. The reversal of 199487331 is 133784991.

It is not a de Polignac number, because 199487331 - 2¹ = 199487329 is a prime.

It is a super-2 number, since 2×199487331² = 79590390459007122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199487311) 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 in 11 ways as a sum of consecutive naturals, for example, 100695 + ... + 102656.

It is an arithmetic number, because the mean of its divisors is an integer number (24232780).

Almost surely, 2^199487331 is an apocalyptic number.

199487331 is a deficient number, since it is larger than the sum of its proper divisors (91306029).

199487331 is a wasteful number, since it uses less digits than its factorization.

199487331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203466 (or 203463 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 199487331 is about 14123.9984069668. The cubic root of 199487331 is about 584.3034356624.

Adding to 199487331 its sum of digits (45), we get a square (199487376 = 14124²).

The spelling of 199487331 in words is "one hundred ninety-nine million, four hundred eighty-seven thousand, three hundred thirty-one".