16228913 has 4 divisors (see below), whose sum is σ = 16281408. Its totient is φ = 16176420.

The previous prime is 16228879. The next prime is 16228969. The reversal of 16228913 is 31982261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16228913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16228913.

It is not an unprimeable number, because it can be changed into a prime (16228213) 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 3 ways as a sum of consecutive naturals, for example, 25781 + ... + 26402.

It is an arithmetic number, because the mean of its divisors is an integer number (4070352).

Almost surely, 2^16228913 is an apocalyptic number.

It is an amenable number.

16228913 is a deficient number, since it is larger than the sum of its proper divisors (52495).

16228913 is an equidigital number, since it uses as much as digits as its factorization.

16228913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52494.

The product of its digits is 5184, while the sum is 32.

The square root of 16228913 is about 4028.5125046349. The cubic root of 16228913 is about 253.1802420304.

The spelling of 16228913 in words is "sixteen million, two hundred twenty-eight thousand, nine hundred thirteen".