2721516 has 48 divisors (see below), whose sum is σ = 7338240. Its totient is φ = 768960.

The previous prime is 2721451. The next prime is 2721517. The reversal of 2721516 is 6151272.

2721516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721517) 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 15 ways as a sum of consecutive naturals, for example, 14946 + ... + 15126.

It is an arithmetic number, because the mean of its divisors is an integer number (152880).

2^2721516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2721516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3669120).

2721516 is an abundant number, since it is smaller than the sum of its proper divisors (4616724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2721516 is a wasteful number, since it uses less digits than its factorization.

2721516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 372 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 2721516 is about 1649.7017912338. The cubic root of 2721516 is about 139.6165698730.

Adding to 2721516 its reverse (6151272), we get a palindrome (8872788).

The spelling of 2721516 in words is "two million, seven hundred twenty-one thousand, five hundred sixteen".