16230581 has 2 divisors, whose sum is σ = 16230582. Its totient is φ = 16230580.

The previous prime is 16230569. The next prime is 16230583. The reversal of 16230581 is 18503261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15928081 + 302500 = 3991^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 16230581 - 2¹⁰ = 16229557 is a prime.

It is a super-2 number, since 2×16230581² = 526863519195122, which contains 22 as substring.

Together with 16230583, 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 16230581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16230583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8115290 + 8115291.

It is an arithmetic number, because the mean of its divisors is an integer number (8115291).

Almost surely, 2^16230581 is an apocalyptic number.

It is an amenable number.

16230581 is a deficient number, since it is larger than the sum of its proper divisors (1).

16230581 is an equidigital number, since it uses as much as digits as its factorization.

16230581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 16230581 is about 4028.7195236204. The cubic root of 16230581 is about 253.1889156484.

The spelling of 16230581 in words is "sixteen million, two hundred thirty thousand, five hundred eighty-one".