216693146 has 4 divisors (see below), whose sum is σ = 325039722. Its totient is φ = 108346572.

The previous prime is 216693109. The next prime is 216693149. The reversal of 216693146 is 641396612.

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

It can be written as a sum of positive squares in only one way, i.e., 214476025 + 2217121 = 14645^2 + 1489^2 .

It is not an unprimeable number, because it can be changed into a prime (216693149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54173285 + ... + 54173288.

Almost surely, 2^216693146 is an apocalyptic number.

216693146 is a deficient number, since it is larger than the sum of its proper divisors (108346576).

216693146 is a wasteful number, since it uses less digits than its factorization.

216693146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108346575.

The product of its digits is 46656, while the sum is 38.

The square root of 216693146 is about 14720.5008746306. The cubic root of 216693146 is about 600.6411165571.

The spelling of 216693146 in words is "two hundred sixteen million, six hundred ninety-three thousand, one hundred forty-six".