16552897 has 4 divisors (see below), whose sum is σ = 16578900. Its totient is φ = 16526896.

The previous prime is 16552871. The next prime is 16552903. The reversal of 16552897 is 79825561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79825561 = 457 ⋅174673.

It can be written as a sum of positive squares in 2 ways, for example, as 4999696 + 11553201 = 2236^2 + 3399^2 .

It is a cyclic number.

It is not a de Polignac number, because 16552897 - 2⁷ = 16552769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16552597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12022 + ... + 13327.

It is an arithmetic number, because the mean of its divisors is an integer number (4144725).

Almost surely, 2^16552897 is an apocalyptic number.

It is an amenable number.

16552897 is a deficient number, since it is larger than the sum of its proper divisors (26003).

16552897 is an equidigital number, since it uses as much as digits as its factorization.

16552897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26002.

The product of its digits is 151200, while the sum is 43.

The square root of 16552897 is about 4068.5251627586. The cubic root of 16552897 is about 254.8539314677.

The spelling of 16552897 in words is "sixteen million, five hundred fifty-two thousand, eight hundred ninety-seven".