216305052 has 48 divisors (see below), whose sum is σ = 511932960. Its totient is φ = 71077888.

The previous prime is 216305021. The next prime is 216305069. The reversal of 216305052 is 250503612.

216305052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

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, 364468 + ... + 365060.

It is an arithmetic number, because the mean of its divisors is an integer number (10665270).

Almost surely, 2^216305052 is an apocalyptic number.

It is an amenable number.

216305052 is an abundant number, since it is smaller than the sum of its proper divisors (295627908).

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

216305052 is a wasteful number, since it uses less digits than its factorization.

216305052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982 (or 980 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 216305052 is about 14707.3128748932. The cubic root of 216305052 is about 600.2823226912.

Adding to 216305052 its reverse (250503612), we get a palindrome (466808664).

The spelling of 216305052 in words is "two hundred sixteen million, three hundred five thousand, fifty-two".