2551516 has 24 divisors (see below), whose sum is σ = 4927104. Its totient is φ = 1146480.

The previous prime is 2551511. The next prime is 2551531. The reversal of 2551516 is 6151552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4251 + ... + 4813.

It is an arithmetic number, because the mean of its divisors is an integer number (205296).

2^2551516 is an apocalyptic number.

It is an amenable number.

2551516 is a deficient number, since it is larger than the sum of its proper divisors (2375588).

2551516 is a wasteful number, since it uses less digits than its factorization.

2551516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 679 counting only the distinct ones).

The product of its digits is 1500, while the sum is 25.

The square root of 2551516 is about 1597.3465497506. The cubic root of 2551516 is about 136.6467893624.

It can be divided in two parts, 255 and 1516, that added together give a palindrome (1771).

The spelling of 2551516 in words is "two million, five hundred fifty-one thousand, five hundred sixteen".