209232912 has 160 divisors (see below), whose sum is σ = 648172800. Its totient is φ = 56899584.

The previous prime is 209232911. The next prime is 209232929. The reversal of 209232912 is 219232902.

It is a happy number.

It is a super-2 number, since 2×209232912² = 87556822927999488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 209232912.

It is not an unprimeable number, because it can be changed into a prime (209232911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1061998 + ... + 1062194.

It is an arithmetic number, because the mean of its divisors is an integer number (4051080).

Almost surely, 2^209232912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209232912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324086400).

209232912 is an abundant number, since it is smaller than the sum of its proper divisors (438939888).

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

209232912 is a wasteful number, since it uses less digits than its factorization.

209232912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 209232912 is about 14464.8854817451. The cubic root of 209232912 is about 593.6675803307.

The spelling of 209232912 in words is "two hundred nine million, two hundred thirty-two thousand, nine hundred twelve".