616002281 has 2 divisors, whose sum is σ = 616002282. Its totient is φ = 616002280.

The previous prime is 616002239. The next prime is 616002301. The reversal of 616002281 is 182200616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614246656 + 1755625 = 24784^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 616002281 - 2¹⁰ = 616001257 is a prime.

It is a super-2 number, since 2×616002281² = 758917620394405922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 616002281.

It is not a weakly prime, because it can be changed into another prime (616002181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308001140 + 308001141.

It is an arithmetic number, because the mean of its divisors is an integer number (308001141).

Almost surely, 2^616002281 is an apocalyptic number.

It is an amenable number.

616002281 is a deficient number, since it is larger than the sum of its proper divisors (1).

616002281 is an equidigital number, since it uses as much as digits as its factorization.

616002281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 616002281 is about 24819.3932439937. The cubic root of 616002281 is about 850.8652232496.

Adding to 616002281 its reverse (182200616), we get a palindrome (798202897).

The spelling of 616002281 in words is "six hundred sixteen million, two thousand, two hundred eighty-one".