216645302 has 4 divisors (see below), whose sum is σ = 324967956. Its totient is φ = 108322650.

The previous prime is 216645269. The next prime is 216645307. The reversal of 216645302 is 203546612.

216645302 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216645307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54161324 + ... + 54161327.

It is an arithmetic number, because the mean of its divisors is an integer number (81241989).

Almost surely, 2^216645302 is an apocalyptic number.

216645302 is a deficient number, since it is larger than the sum of its proper divisors (108322654).

216645302 is a wasteful number, since it uses less digits than its factorization.

216645302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108322653.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 216645302 is about 14718.8757043464. The cubic root of 216645302 is about 600.5969078233.

The spelling of 216645302 in words is "two hundred sixteen million, six hundred forty-five thousand, three hundred two".