216104447 has 4 divisors (see below), whose sum is σ = 232727880. Its totient is φ = 199481016.

The previous prime is 216104437. The next prime is 216104501. The reversal of 216104447 is 744401612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 216104447 - 2¹⁴ = 216088063 is a prime.

It is a super-2 number, since 2×216104447² = 93402264026351618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216104437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8311697 + ... + 8311722.

It is an arithmetic number, because the mean of its divisors is an integer number (58181970).

Almost surely, 2^216104447 is an apocalyptic number.

216104447 is a deficient number, since it is larger than the sum of its proper divisors (16623433).

216104447 is a wasteful number, since it uses less digits than its factorization.

216104447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16623432.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 216104447 is about 14700.4913863449. The cubic root of 216104447 is about 600.0966946013.

The spelling of 216104447 in words is "two hundred sixteen million, one hundred four thousand, four hundred forty-seven".