199999530 has 40 divisors (see below), whose sum is σ = 537778692. Its totient is φ = 53332992.

The previous prime is 199999483. The next prime is 199999589. The reversal of 199999530 is 35999991.

It is a happy number.

199999530 is a `hidden beast` number, since 19 + 9 + 9 + 99 + 530 = 666.

199999530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 199911321 + 88209 = 14139^2 + 297^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 122647 + ... + 124266.

Almost surely, 2^199999530 is an apocalyptic number.

199999530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199999530 is an abundant number, since it is smaller than the sum of its proper divisors (337779162).

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

199999530 is a wasteful number, since it uses less digits than its factorization.

199999530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246932 (or 246923 counting only the distinct ones).

The product of its (nonzero) digits is 885735, while the sum is 54.

The square root of 199999530 is about 14142.1190067118. The cubic root of 199999530 is about 584.8030895461.

The spelling of 199999530 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred thirty".