2516891 has 4 divisors (see below), whose sum is σ = 2710512. Its totient is φ = 2323272.

The previous prime is 2516887. The next prime is 2516893. The reversal of 2516891 is 1986152.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2516891 - 2² = 2516887 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (2516893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96791 + ... + 96816.

It is an arithmetic number, because the mean of its divisors is an integer number (677628).

2^2516891 is an apocalyptic number.

2516891 is a deficient number, since it is larger than the sum of its proper divisors (193621).

2516891 is a wasteful number, since it uses less digits than its factorization.

2516891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193620.

The product of its digits is 4320, while the sum is 32.

The square root of 2516891 is about 1586.4712414664. The cubic root of 2516891 is about 136.0258565313.

The spelling of 2516891 in words is "two million, five hundred sixteen thousand, eight hundred ninety-one".