209194530 has 32 divisors (see below), whose sum is σ = 510580800. Its totient is φ = 54839232.

The previous prime is 209194529. The next prime is 209194543. The reversal of 209194530 is 35491902.

It is a junction number, because it is equal to n+sod(n) for n = 209194491 and 209194500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57325 + ... + 60864.

It is an arithmetic number, because the mean of its divisors is an integer number (15955650).

Almost surely, 2^209194530 is an apocalyptic number.

209194530 is an abundant number, since it is smaller than the sum of its proper divisors (301386270).

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

209194530 is a wasteful number, since it uses less digits than its factorization.

209194530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118258.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 209194530 is about 14463.5586907234. The cubic root of 209194530 is about 593.6312770195.

The spelling of 209194530 in words is "two hundred nine million, one hundred ninety-four thousand, five hundred thirty".