2821500 has 192 divisors, whose sum is σ = 10483200. Its totient is φ = 648000.

The previous prime is 2821493. The next prime is 2821501. The reversal of 2821500 is 51282.

2821500 is a nontrivial binomial coefficient, being equal to C(2376, 2).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 148491 + ... + 148509.

It is an arithmetic number, because the mean of its divisors is an integer number (54600).

2^2821500 is an apocalyptic number.

2821500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

2821500 is the 2375-th triangular number and also the 1188-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2821500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5241600).

2821500 is an abundant number, since it is smaller than the sum of its proper divisors (7661700).

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

2821500 is a wasteful number, since it uses less digits than its factorization.

2821500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2821500 is about 1679.7321215003. The cubic root of 2821500 is about 141.3058097782.

Adding to 2821500 its reverse (51282), we get a palindrome (2872782).

It can be divided in two parts, 2821 and 500, that added together give a triangular number (3321 = T₈₁).

The spelling of 2821500 in words is "two million, eight hundred twenty-one thousand, five hundred".