16622555 has 8 divisors (see below), whose sum is σ = 20019744. Its totient is φ = 13249600.

The previous prime is 16622527. The next prime is 16622563. The reversal of 16622555 is 55522661.

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

It is not a de Polignac number, because 16622555 - 2⁸ = 16622299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4511 + ... + 7320.

It is an arithmetic number, because the mean of its divisors is an integer number (2502468).

Almost surely, 2^16622555 is an apocalyptic number.

16622555 is a deficient number, since it is larger than the sum of its proper divisors (3397189).

16622555 is a wasteful number, since it uses less digits than its factorization.

16622555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12117.

The product of its digits is 18000, while the sum is 32.

The square root of 16622555 is about 4077.0767714136. The cubic root of 16622555 is about 255.2109237814.

The spelling of 16622555 in words is "sixteen million, six hundred twenty-two thousand, five hundred fifty-five".