212340330 has 48 divisors (see below), whose sum is σ = 553802184. Its totient is φ = 56448000.

The previous prime is 212340281. The next prime is 212340343. The reversal of 212340330 is 33043212.

It can be written as a sum of positive squares in 4 ways, for example, as 140209281 + 72131049 = 11841^2 + 8493^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon 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, 26830 + ... + 33830.

Almost surely, 2^212340330 is an apocalyptic number.

212340330 is an abundant number, since it is smaller than the sum of its proper divisors (341461854).

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

212340330 is a wasteful number, since it uses less digits than its factorization.

212340330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7351 (or 7348 counting only the distinct ones).

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

The square root of 212340330 is about 14571.9020721387. The cubic root of 212340330 is about 596.5920969752.

Adding to 212340330 its reverse (33043212), we get a palindrome (245383542).

The spelling of 212340330 in words is "two hundred twelve million, three hundred forty thousand, three hundred thirty".