216303612 has 24 divisors (see below), whose sum is σ = 576809856. Its totient is φ = 61801008.

The previous prime is 216303611. The next prime is 216303623.

It is a happy number.

216303612 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216303611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1287438 + ... + 1287605.

It is an arithmetic number, because the mean of its divisors is an integer number (24033744).

Almost surely, 2^216303612 is an apocalyptic number.

It is an amenable number.

216303612 is an abundant number, since it is smaller than the sum of its proper divisors (360506244).

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

216303612 is a wasteful number, since it uses less digits than its factorization.

216303612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575057 (or 2575055 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 216303612 is about 14707.2639195739. The cubic root of 216303612 is about 600.2809906088.

The spelling of 216303612 in words is "two hundred sixteen million, three hundred three thousand, six hundred twelve".