216849146 has 4 divisors (see below), whose sum is σ = 325273722. Its totient is φ = 108424572.

The previous prime is 216849133. The next prime is 216849151. The reversal of 216849146 is 641948612.

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., 202749121 + 14100025 = 14239^2 + 3755^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54212285 + ... + 54212288.

Almost surely, 2^216849146 is an apocalyptic number.

216849146 is a deficient number, since it is larger than the sum of its proper divisors (108424576).

216849146 is a wasteful number, since it uses less digits than its factorization.

216849146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108424575.

The product of its digits is 82944, while the sum is 41.

The square root of 216849146 is about 14725.7986540629. The cubic root of 216849146 is about 600.7852182352.

The spelling of 216849146 in words is "two hundred sixteen million, eight hundred forty-nine thousand, one hundred forty-six".