216435330 has 48 divisors (see below), whose sum is σ = 595837944. Its totient is φ = 54320640.

The previous prime is 216435301. The next prime is 216435337. The reversal of 216435330 is 33534612.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 137100681 + 79334649 = 11709^2 + 8907^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216435294 and 216435303.

It is not an unprimeable number, because it can be changed into a prime (216435337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69201 + ... + 72260.

Almost surely, 2^216435330 is an apocalyptic number.

216435330 is an abundant number, since it is smaller than the sum of its proper divisors (379402614).

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

216435330 is a wasteful number, since it uses less digits than its factorization.

216435330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141491 (or 141488 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 216435330 is about 14711.7412293719. The cubic root of 216435330 is about 600.4028128425.

Adding to 216435330 its reverse (33534612), we get a palindrome (249969942).

The spelling of 216435330 in words is "two hundred sixteen million, four hundred thirty-five thousand, three hundred thirty".