16161133 has 4 divisors (see below), whose sum is σ = 16169248. Its totient is φ = 16153020.

The previous prime is 16161127. The next prime is 16161139. The reversal of 16161133 is 33116161.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 33116161 = 13 ⋅2547397.

It is an interprime number because it is at equal distance from previous prime (16161127) and next prime (16161139).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16161133 is a prime.

It is a super-2 number, since 2×16161133² = 522364439687378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161139) 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, 1210 + ... + 5812.

It is an arithmetic number, because the mean of its divisors is an integer number (4042312).

Almost surely, 2^16161133 is an apocalyptic number.

It is an amenable number.

16161133 is a deficient number, since it is larger than the sum of its proper divisors (8115).

16161133 is an equidigital number, since it uses as much as digits as its factorization.

16161133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8114.

The product of its digits is 324, while the sum is 22.

The square root of 16161133 is about 4020.0911681204. The cubic root of 16161133 is about 252.8272813869.

Adding to 16161133 its reverse (33116161), we get a palindrome (49277294).

The spelling of 16161133 in words is "sixteen million, one hundred sixty-one thousand, one hundred thirty-three".