16622455 has 4 divisors (see below), whose sum is σ = 19946952. Its totient is φ = 13297960.

The previous prime is 16622407. The next prime is 16622513. The reversal of 16622455 is 55422661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16622455 - 2²³ = 8233847 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 1662241 + ... + 1662250.

It is an arithmetic number, because the mean of its divisors is an integer number (4986738).

Almost surely, 2^16622455 is an apocalyptic number.

16622455 is a deficient number, since it is larger than the sum of its proper divisors (3324497).

16622455 is an equidigital number, since it uses as much as digits as its factorization.

16622455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324496.

The product of its digits is 14400, while the sum is 31.

The square root of 16622455 is about 4077.0645077065. The cubic root of 16622455 is about 255.2104120040.

The spelling of 16622455 in words is "sixteen million, six hundred twenty-two thousand, four hundred fifty-five".