213320322 has 24 divisors (see below), whose sum is σ = 462971964. Its totient is φ = 70987104.

The previous prime is 213320321. The next prime is 213320323. The reversal of 213320322 is 223023312.

It is a happy number.

213320322 is a `hidden beast` number, since 21 + 3 + 320 + 322 = 666.

It is an interprime number because it is at equal distance from previous prime (213320321) and next prime (213320323).

It can be written as a sum of positive squares in 2 ways, for example, as 211440681 + 1879641 = 14541^2 + 1371^2 .

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 = 213320295 and 213320304.

It is not an unprimeable number, because it can be changed into a prime (213320321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1368 + ... + 20700.

Almost surely, 2^213320322 is an apocalyptic number.

213320322 is an abundant number, since it is smaller than the sum of its proper divisors (249651642).

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

213320322 is a wasteful number, since it uses less digits than its factorization.

213320322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19954 (or 19951 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 213320322 is about 14605.4894474646. The cubic root of 213320322 is about 597.5084849084.

Adding to 213320322 its reverse (223023312), we get a palindrome (436343634).

The spelling of 213320322 in words is "two hundred thirteen million, three hundred twenty thousand, three hundred twenty-two".