2516281 has 8 divisors (see below), whose sum is σ = 2587464. Its totient is φ = 2446080.

The previous prime is 2516273. The next prime is 2516299. The reversal of 2516281 is 1826152.

2516281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1690000 + 826281 = 1300^2 + 909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2516281 - 2³ = 2516273 is a prime.

It is a super-2 number, since 2×2516281² = 12663340141922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2516201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10321 + ... + 10561.

It is an arithmetic number, because the mean of its divisors is an integer number (323433).

2^2516281 is an apocalyptic number.

It is an amenable number.

2516281 is a deficient number, since it is larger than the sum of its proper divisors (71183).

2516281 is a wasteful number, since it uses less digits than its factorization.

2516281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491.

The product of its digits is 960, while the sum is 25.

The square root of 2516281 is about 1586.2789792467. The cubic root of 2516281 is about 136.0148664544.

The spelling of 2516281 in words is "two million, five hundred sixteen thousand, two hundred eighty-one".