16236161 has 2 divisors, whose sum is σ = 16236162. Its totient is φ = 16236160.

The previous prime is 16236131. The next prime is 16236163. The reversal of 16236161 is 16163261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12645136 + 3591025 = 3556^2 + 1895^2 .

It is an emirp because it is prime and its reverse (16163261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16236161 - 2¹⁸ = 15974017 is a prime.

It is a super-2 number, since 2×16236161² = 527225848035842, which contains 22 as substring.

Together with 16236163, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16236161.

It is not a weakly prime, because it can be changed into another prime (16236163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8118080 + 8118081.

It is an arithmetic number, because the mean of its divisors is an integer number (8118081).

Almost surely, 2^16236161 is an apocalyptic number.

It is an amenable number.

16236161 is a deficient number, since it is larger than the sum of its proper divisors (1).

16236161 is an equidigital number, since it uses as much as digits as its factorization.

16236161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 16236161 is about 4029.4119918420. The cubic root of 16236161 is about 253.2179273902.

Subtracting from 16236161 its reverse (16163261), we obtain a square (72900 = 270²).

The spelling of 16236161 in words is "sixteen million, two hundred thirty-six thousand, one hundred sixty-one".