199331931 has 8 divisors (see below), whose sum is σ = 269140480. Its totient is φ = 131205672.

The previous prime is 199331927. The next prime is 199331941. The reversal of 199331931 is 139133991.

199331931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 199331931 - 2² = 199331927 is a prime.

It is a super-2 number, since 2×199331931² = 79466437432377522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199331931.

It is not an unprimeable number, because it can be changed into a prime (199331921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420295 + ... + 420768.

It is an arithmetic number, because the mean of its divisors is an integer number (33642560).

Almost surely, 2^199331931 is an apocalyptic number.

199331931 is a deficient number, since it is larger than the sum of its proper divisors (69808549).

199331931 is an equidigital number, since it uses as much as digits as its factorization.

199331931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841145.

The product of its digits is 19683, while the sum is 39.

The square root of 199331931 is about 14118.4960601333. The cubic root of 199331931 is about 584.1516727384.

The spelling of 199331931 in words is "one hundred ninety-nine million, three hundred thirty-one thousand, nine hundred thirty-one".