213227766 has 48 divisors (see below), whose sum is σ = 491203440. Its totient is φ = 66657600.

The previous prime is 213227741. The next prime is 213227803. The reversal of 213227766 is 667722312.

It is a happy number.

213227766 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 213227766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31456 + ... + 37628.

It is an arithmetic number, because the mean of its divisors is an integer number (10233405).

Almost surely, 2^213227766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213227766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245601720).

213227766 is an abundant number, since it is smaller than the sum of its proper divisors (277975674).

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

213227766 is a wasteful number, since it uses less digits than its factorization.

213227766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6301 (or 6298 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 213227766 is about 14602.3205690055. The cubic root of 213227766 is about 597.4220562064.

The spelling of 213227766 in words is "two hundred thirteen million, two hundred twenty-seven thousand, seven hundred sixty-six".