16402217 has 8 divisors (see below), whose sum is σ = 17888640. Its totient is φ = 14947920.

The previous prime is 16402213. The next prime is 16402223. The reversal of 16402217 is 71220461.

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

It is not a de Polignac number, because 16402217 - 2² = 16402213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16402192 and 16402201.

It is not an unprimeable number, because it can be changed into a prime (16402213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6959 + ... + 9012.

It is an arithmetic number, because the mean of its divisors is an integer number (2236080).

Almost surely, 2^16402217 is an apocalyptic number.

It is an amenable number.

16402217 is a deficient number, since it is larger than the sum of its proper divisors (1486423).

16402217 is a wasteful number, since it uses less digits than its factorization.

16402217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16063.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 16402217 is about 4049.9650615777. The cubic root of 16402217 is about 254.0782665374.

Adding to 16402217 its reverse (71220461), we get a palindrome (87622678).

The spelling of 16402217 in words is "sixteen million, four hundred two thousand, two hundred seventeen".