16551442 has 8 divisors (see below), whose sum is σ = 24926832. Its totient is φ = 8242500.

The previous prime is 16551439. The next prime is 16551443. The reversal of 16551442 is 24415561.

16551442 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 self number, because there is not a number n which added to its sum of digits gives 16551442.

It is not an unprimeable number, because it can be changed into a prime (16551443) 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, 15984 + ... + 16987.

It is an arithmetic number, because the mean of its divisors is an integer number (3115854).

Almost surely, 2^16551442 is an apocalyptic number.

16551442 is a deficient number, since it is larger than the sum of its proper divisors (8375390).

16551442 is a wasteful number, since it uses less digits than its factorization.

16551442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33224.

The product of its digits is 4800, while the sum is 28.

The square root of 16551442 is about 4068.3463471047. The cubic root of 16551442 is about 254.8464640269.

The spelling of 16551442 in words is "sixteen million, five hundred fifty-one thousand, four hundred forty-two".