209533230 has 80 divisors (see below), whose sum is σ = 567151200. Its totient is φ = 55505088.

The previous prime is 209533229. The next prime is 209533237. The reversal of 209533230 is 32335902.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 209533194 and 209533203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209533237) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 134496 + ... + 136044.

It is an arithmetic number, because the mean of its divisors is an integer number (7089390).

Almost surely, 2^209533230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209533230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283575600).

209533230 is an abundant number, since it is smaller than the sum of its proper divisors (357617970).

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

209533230 is a wasteful number, since it uses less digits than its factorization.

209533230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735 (or 1726 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The square root of 209533230 is about 14475.2626919169. The cubic root of 209533230 is about 593.9514805793.

The spelling of 209533230 in words is "two hundred nine million, five hundred thirty-three thousand, two hundred thirty".