209321472 has 40 divisors (see below), whose sum is σ = 557649576. Its totient is φ = 69773312.

The previous prime is 209321447. The next prime is 209321473. The reversal of 209321472 is 274123902.

209321472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209321473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66603 + ... + 69674.

Almost surely, 2^209321472 is an apocalyptic number.

It is an amenable number.

209321472 is an abundant number, since it is smaller than the sum of its proper divisors (348328104).

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

209321472 is an equidigital number, since it uses as much as digits as its factorization.

209321472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136298 (or 136282 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 209321472 is about 14467.9463642910. The cubic root of 209321472 is about 593.7513271697.

The spelling of 209321472 in words is "two hundred nine million, three hundred twenty-one thousand, four hundred seventy-two".