16216553 has 4 divisors (see below), whose sum is σ = 16335060. Its totient is φ = 16098048.

The previous prime is 16216549. The next prime is 16216573. The reversal of 16216553 is 35561261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35561261 = 1823 ⋅19507.

It can be written as a sum of positive squares in 2 ways, for example, as 8133904 + 8082649 = 2852^2 + 2843^2 .

It is not a de Polignac number, because 16216553 - 2² = 16216549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16216513) 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, 59048 + ... + 59321.

It is an arithmetic number, because the mean of its divisors is an integer number (4083765).

Almost surely, 2^16216553 is an apocalyptic number.

It is an amenable number.

16216553 is a deficient number, since it is larger than the sum of its proper divisors (118507).

16216553 is a wasteful number, since it uses less digits than its factorization.

16216553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118506.

The product of its digits is 5400, while the sum is 29.

The square root of 16216553 is about 4026.9781474451. The cubic root of 16216553 is about 253.1159513709.

The spelling of 16216553 in words is "sixteen million, two hundred sixteen thousand, five hundred fifty-three".