16220605 has 8 divisors (see below), whose sum is σ = 19605600. Its totient is φ = 12882576.

The previous prime is 16220563. The next prime is 16220609. The reversal of 16220605 is 50602261.

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 16220605 - 2⁹ = 16220093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16220609) 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, 10975 + ... + 12364.

It is an arithmetic number, because the mean of its divisors is an integer number (2450700).

Almost surely, 2^16220605 is an apocalyptic number.

It is an amenable number.

16220605 is a deficient number, since it is larger than the sum of its proper divisors (3384995).

16220605 is a wasteful number, since it uses less digits than its factorization.

16220605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23483.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 16220605 is about 4027.4812227992. The cubic root of 16220605 is about 253.1370314862.

Adding to 16220605 its reverse (50602261), we get a palindrome (66822866).

The spelling of 16220605 in words is "sixteen million, two hundred twenty thousand, six hundred five".