213212330 has 16 divisors (see below), whose sum is σ = 383951880. Its totient is φ = 85247232.

The previous prime is 213212303. The next prime is 213212339. The reversal of 213212330 is 33212312.

It can be written as a sum of positive squares in 4 ways, for example, as 161213809 + 51998521 = 12697^2 + 7211^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213212299 and 213212308.

It is not an unprimeable number, because it can be changed into a prime (213212339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34862 + ... + 40518.

Almost surely, 2^213212330 is an apocalyptic number.

213212330 is a deficient number, since it is larger than the sum of its proper divisors (170739550).

213212330 is a wasteful number, since it uses less digits than its factorization.

213212330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9433.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 213212330 is about 14601.7920133112. The cubic root of 213212330 is about 597.4076396515.

Adding to 213212330 its reverse (33212312), we get a palindrome (246424642).

The spelling of 213212330 in words is "two hundred thirteen million, two hundred twelve thousand, three hundred thirty".