16434553 has 4 divisors (see below), whose sum is σ = 16442740. Its totient is φ = 16426368.

The previous prime is 16434547. The next prime is 16434569. The reversal of 16434553 is 35543461.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 35543461 = 2539 ⋅13999.

It can be written as a sum of positive squares in 2 ways, for example, as 1750329 + 14684224 = 1323^2 + 3832^2 .

It is a cyclic number.

It is not a de Polignac number, because 16434553 - 2⁵ = 16434521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16434653) 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, 1201 + ... + 5857.

It is an arithmetic number, because the mean of its divisors is an integer number (4110685).

Almost surely, 2^16434553 is an apocalyptic number.

It is an amenable number.

16434553 is a deficient number, since it is larger than the sum of its proper divisors (8187).

16434553 is an equidigital number, since it uses as much as digits as its factorization.

16434553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8186.

The product of its digits is 21600, while the sum is 31.

The square root of 16434553 is about 4053.9552291558. The cubic root of 16434553 is about 254.2451236904.

The spelling of 16434553 in words is "sixteen million, four hundred thirty-four thousand, five hundred fifty-three".