212231330 has 32 divisors (see below), whose sum is σ = 404006400. Its totient is φ = 80047872.

The previous prime is 212231321. The next prime is 212231339. The reversal of 212231330 is 33132212.

It is an interprime number because it is at equal distance from previous prime (212231321) and next prime (212231339).

It is a junction number, because it is equal to n+sod(n) for n = 212231299 and 212231308.

It is not an unprimeable number, because it can be changed into a prime (212231339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39866 + ... + 44874.

It is an arithmetic number, because the mean of its divisors is an integer number (12625200).

Almost surely, 2^212231330 is an apocalyptic number.

212231330 is a deficient number, since it is larger than the sum of its proper divisors (191775070).

212231330 is a wasteful number, since it uses less digits than its factorization.

212231330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5258.

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

The square root of 212231330 is about 14568.1615175011. The cubic root of 212231330 is about 596.4899972490.

Adding to 212231330 its reverse (33132212), we get a palindrome (245363542).

The spelling of 212231330 in words is "two hundred twelve million, two hundred thirty-one thousand, three hundred thirty".