16550231 has 8 divisors (see below), whose sum is σ = 17559360. Its totient is φ = 15545088.

The previous prime is 16550189. The next prime is 16550239. The reversal of 16550231 is 13205561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16550231 - 2¹⁸ = 16288087 is a prime.

It is a super-2 number, since 2×16550231² = 547820292306722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16550197 and 16550206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16550239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15410 + ... + 16448.

It is an arithmetic number, because the mean of its divisors is an integer number (2194920).

Almost surely, 2^16550231 is an apocalyptic number.

16550231 is a deficient number, since it is larger than the sum of its proper divisors (1009129).

16550231 is a wasteful number, since it uses less digits than its factorization.

16550231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 16550231 is about 4068.1975124126. The cubic root of 16550231 is about 254.8402485243.

Adding to 16550231 its reverse (13205561), we get a palindrome (29755792).

The spelling of 16550231 in words is "sixteen million, five hundred fifty thousand, two hundred thirty-one".