16552559 has 4 divisors (see below), whose sum is σ = 16663800. Its totient is φ = 16441320.

The previous prime is 16552517. The next prime is 16552567. The reversal of 16552559 is 95525561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95525561 = 997 ⋅95813.

It is a cyclic number.

It is not a de Polignac number, because 16552559 - 2⁸ = 16552303 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 (16552859) 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, 55397 + ... + 55694.

It is an arithmetic number, because the mean of its divisors is an integer number (4165950).

Almost surely, 2^16552559 is an apocalyptic number.

16552559 is a deficient number, since it is larger than the sum of its proper divisors (111241).

16552559 is a wasteful number, since it uses less digits than its factorization.

16552559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111240.

The product of its digits is 67500, while the sum is 38.

The square root of 16552559 is about 4068.4836241529. The cubic root of 16552559 is about 254.8521968023.

The spelling of 16552559 in words is "sixteen million, five hundred fifty-two thousand, five hundred fifty-nine".