209010222 has 48 divisors (see below), whose sum is σ = 486869760. Its totient is φ = 64593936.

The previous prime is 209010211. The next prime is 209010227. The reversal of 209010222 is 222010902.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 209010195 and 209010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209010227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9573 + ... + 22575.

It is an arithmetic number, because the mean of its divisors is an integer number (10143120).

Almost surely, 2^209010222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209010222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243434880).

209010222 is an abundant number, since it is smaller than the sum of its proper divisors (277859538).

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

209010222 is a wasteful number, since it uses less digits than its factorization.

209010222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13077 (or 13074 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 209010222 is about 14457.1858257408. The cubic root of 209010222 is about 593.4568888702.

The spelling of 209010222 in words is "two hundred nine million, ten thousand, two hundred twenty-two".