16622143 has 4 divisors (see below), whose sum is σ = 16636048. Its totient is φ = 16608240.

The previous prime is 16622117. The next prime is 16622147. The reversal of 16622143 is 34122661.

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

It is a cyclic number.

It is not a de Polignac number, because 16622143 - 2¹³ = 16613951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16622147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4971 + ... + 7612.

It is an arithmetic number, because the mean of its divisors is an integer number (4159012).

Almost surely, 2^16622143 is an apocalyptic number.

16622143 is a deficient number, since it is larger than the sum of its proper divisors (13905).

16622143 is a wasteful number, since it uses less digits than its factorization.

16622143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13904.

The product of its digits is 1728, while the sum is 25.

The square root of 16622143 is about 4077.0262447034. The cubic root of 16622143 is about 255.2088152453.

The spelling of 16622143 in words is "sixteen million, six hundred twenty-two thousand, one hundred forty-three".