21416219 has 8 divisors (see below), whose sum is σ = 23399280. Its totient is φ = 19439200.

The previous prime is 21416183. The next prime is 21416281. The reversal of 21416219 is 91261412.

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

It is not a de Polignac number, because 21416219 - 2¹² = 21412123 is a prime.

It is a super-2 number, since 2×21416219² = 917308872511922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21410219) 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, 9317 + ... + 11385.

It is an arithmetic number, because the mean of its divisors is an integer number (2924910).

Almost surely, 2^21416219 is an apocalyptic number.

21416219 is a deficient number, since it is larger than the sum of its proper divisors (1983061).

21416219 is a wasteful number, since it uses less digits than its factorization.

21416219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3021.

The product of its digits is 864, while the sum is 26.

The square root of 21416219 is about 4627.7660917553. The cubic root of 21416219 is about 277.7032312611.

The spelling of 21416219 in words is "twenty-one million, four hundred sixteen thousand, two hundred nineteen".