199820530 has 144 divisors (see below), whose sum is σ = 480660480. Its totient is φ = 59439744.

The previous prime is 199820519. The next prime is 199820531. The reversal of 199820530 is 35028991.

199820530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 199820530.

It is not an unprimeable number, because it can be changed into a prime (199820531) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1573327 + ... + 1573453.

It is an arithmetic number, because the mean of its divisors is an integer number (3337920).

Almost surely, 2^199820530 is an apocalyptic number.

199820530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199820530 is an abundant number, since it is smaller than the sum of its proper divisors (280839950).

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

199820530 is a wasteful number, since it uses less digits than its factorization.

199820530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 199820530 is about 14135.7889769195. The cubic root of 199820530 is about 584.6285708058.

The spelling of 199820530 in words is "one hundred ninety-nine million, eight hundred twenty thousand, five hundred thirty".