213320466 has 48 divisors (see below), whose sum is σ = 492308544. Its totient is φ = 69179184.

The previous prime is 213320449. The next prime is 213320509. The reversal of 213320466 is 664023312.

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

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, 12051 + ... + 23913.

It is an arithmetic number, because the mean of its divisors is an integer number (10256428).

Almost surely, 2^213320466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213320466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246154272).

213320466 is an abundant number, since it is smaller than the sum of its proper divisors (278988078).

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

213320466 is a wasteful number, since it uses less digits than its factorization.

213320466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11917 (or 11905 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 213320466 is about 14605.4943771171. The cubic root of 213320466 is about 597.5086193559.

Adding to 213320466 its reverse (664023312), we get a palindrome (877343778).

The spelling of 213320466 in words is "two hundred thirteen million, three hundred twenty thousand, four hundred sixty-six".