16226561 has 8 divisors (see below), whose sum is σ = 17525760. Its totient is φ = 14934672.

The previous prime is 16226543. The next prime is 16226563. The reversal of 16226561 is 16562261.

16226561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16226561 - 2¹⁴ = 16210177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16226563) 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, 3350 + ... + 6608.

It is an arithmetic number, because the mean of its divisors is an integer number (2190720).

Almost surely, 2^16226561 is an apocalyptic number.

It is an amenable number.

16226561 is a deficient number, since it is larger than the sum of its proper divisors (1299199).

16226561 is a wasteful number, since it uses less digits than its factorization.

16226561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655.

The product of its digits is 4320, while the sum is 29.

The square root of 16226561 is about 4028.2205748941. The cubic root of 16226561 is about 253.1680105951.

The spelling of 16226561 in words is "sixteen million, two hundred twenty-six thousand, five hundred sixty-one".