16552257 has 4 divisors (see below), whose sum is σ = 22069680. Its totient is φ = 11034836.

The previous prime is 16552253. The next prime is 16552267. The reversal of 16552257 is 75225561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16552257 - 2² = 16552253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16552253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2758707 + ... + 2758712.

It is an arithmetic number, because the mean of its divisors is an integer number (5517420).

Almost surely, 2^16552257 is an apocalyptic number.

It is an amenable number.

16552257 is a deficient number, since it is larger than the sum of its proper divisors (5517423).

16552257 is an equidigital number, since it uses as much as digits as its factorization.

16552257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517422.

The product of its digits is 21000, while the sum is 33.

The square root of 16552257 is about 4068.4465094186. The cubic root of 16552257 is about 254.8506468741.

The spelling of 16552257 in words is "sixteen million, five hundred fifty-two thousand, two hundred fifty-seven".