2516391 has 12 divisors (see below), whose sum is σ = 3848832. Its totient is φ = 1578816.

The previous prime is 2516377. The next prime is 2516401. The reversal of 2516391 is 1936152.

2516391 is a `hidden beast` number, since 25 + 1 + 639 + 1 = 666.

It is not a de Polignac number, because 2516391 - 2⁷ = 2516263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2516351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8071 + ... + 8376.

It is an arithmetic number, because the mean of its divisors is an integer number (320736).

2^2516391 is an apocalyptic number.

2516391 is a deficient number, since it is larger than the sum of its proper divisors (1332441).

2516391 is a wasteful number, since it uses less digits than its factorization.

2516391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16470 (or 16467 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 2516391 is about 1586.3136512052. The cubic root of 2516391 is about 136.0168484028.

The spelling of 2516391 in words is "two million, five hundred sixteen thousand, three hundred ninety-one".