216671901 has 8 divisors (see below), whose sum is σ = 289564800. Its totient is φ = 144113472.

The previous prime is 216671899. The next prime is 216671941. The reversal of 216671901 is 109176612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216671901 - 2¹ = 216671899 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216671941) 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, 82101 + ... + 84698.

It is an arithmetic number, because the mean of its divisors is an integer number (36195600).

Almost surely, 2^216671901 is an apocalyptic number.

It is an amenable number.

216671901 is a deficient number, since it is larger than the sum of its proper divisors (72892899).

216671901 is a wasteful number, since it uses less digits than its factorization.

216671901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167235.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 216671901 is about 14719.7792442686. The cubic root of 216671901 is about 600.6214865907.

The spelling of 216671901 in words is "two hundred sixteen million, six hundred seventy-one thousand, nine hundred one".