16551441 has 12 divisors (see below), whose sum is σ = 23954320. Its totient is φ = 11012760.

The previous prime is 16551439. The next prime is 16551443. The reversal of 16551441 is 14415561.

16551441 is a `hidden beast` number, since 1 + 655 + 1 + 4 + 4 + 1 = 666.

16551441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16551439) and next prime (16551443).

It is not a de Polignac number, because 16551441 - 2¹ = 16551439 is a prime.

It is a super-4 number, since 4×16551441⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 4086 + ... + 7056.

Almost surely, 2^16551441 is an apocalyptic number.

It is an amenable number.

16551441 is a deficient number, since it is larger than the sum of its proper divisors (7402879).

16551441 is a wasteful number, since it uses less digits than its factorization.

16551441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3596 (or 3593 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 16551441 is about 4068.3462242046. The cubic root of 16551441 is about 254.8464588945.

The spelling of 16551441 in words is "sixteen million, five hundred fifty-one thousand, four hundred forty-one".