16422551 has 4 divisors (see below), whose sum is σ = 16460400. Its totient is φ = 16384704.

The previous prime is 16422533. The next prime is 16422559. The reversal of 16422551 is 15522461.

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 16422551 - 2¹⁰ = 16421527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16422551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16422559) 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, 18266 + ... + 19143.

It is an arithmetic number, because the mean of its divisors is an integer number (4115100).

Almost surely, 2^16422551 is an apocalyptic number.

16422551 is a deficient number, since it is larger than the sum of its proper divisors (37849).

16422551 is an equidigital number, since it uses as much as digits as its factorization.

16422551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37848.

The product of its digits is 2400, while the sum is 26.

The square root of 16422551 is about 4052.4746760467. The cubic root of 16422551 is about 254.1832176746.

The spelling of 16422551 in words is "sixteen million, four hundred twenty-two thousand, five hundred fifty-one".