199331538 has 32 divisors (see below), whose sum is σ = 456576000. Its totient is φ = 56831760.

The previous prime is 199331533. The next prime is 199331557. The reversal of 199331538 is 835133991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 199331538.

It is not an unprimeable number, because it can be changed into a prime (199331533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16203 + ... + 25713.

It is an arithmetic number, because the mean of its divisors is an integer number (14268000).

Almost surely, 2^199331538 is an apocalyptic number.

199331538 is an abundant number, since it is smaller than the sum of its proper divisors (257244462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199331538 is a wasteful number, since it uses less digits than its factorization.

199331538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10022.

The product of its digits is 87480, while the sum is 42.

The square root of 199331538 is about 14118.4821422134. The cubic root of 199331538 is about 584.1512888365.

The spelling of 199331538 in words is "one hundred ninety-nine million, three hundred thirty-one thousand, five hundred thirty-eight".