213221330 has 32 divisors (see below), whose sum is σ = 442900224. Its totient is φ = 72392256.

The previous prime is 213221251. The next prime is 213221377. The reversal of 213221330 is 33122312.

It is a junction number, because it is equal to n+sod(n) for n = 213221299 and 213221308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7577 + ... + 21996.

It is an arithmetic number, because the mean of its divisors is an integer number (13840632).

Almost surely, 2^213221330 is an apocalyptic number.

213221330 is an abundant number, since it is smaller than the sum of its proper divisors (229678894).

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

213221330 is a wasteful number, since it uses less digits than its factorization.

213221330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29690.

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

The square root of 213221330 is about 14602.1001914108. The cubic root of 213221330 is about 597.4160453460.

Adding to 213221330 its reverse (33122312), we get a palindrome (246343642).

The spelling of 213221330 in words is "two hundred thirteen million, two hundred twenty-one thousand, three hundred thirty".