16224055921 has 8 divisors (see below), whose sum is σ = 16638126624. Its totient is φ = 15810859680.

The previous prime is 16224055919. The next prime is 16224055931. The reversal of 16224055921 is 12955042261.

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

It is a cyclic number.

It is not a de Polignac number, because 16224055921 - 2¹ = 16224055919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16224055931) 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, 180955 + ... + 255328.

It is an arithmetic number, because the mean of its divisors is an integer number (2079765828).

Almost surely, 2^16224055921 is an apocalyptic number.

It is an amenable number.

16224055921 is a deficient number, since it is larger than the sum of its proper divisors (414070703).

16224055921 is an equidigital number, since it uses as much as digits as its factorization.

16224055921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437231.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 16224055921 in words is "sixteen billion, two hundred twenty-four million, fifty-five thousand, nine hundred twenty-one".