5821215 has 8 divisors (see below), whose sum is σ = 9313968. Its totient is φ = 3104640.

The previous prime is 5821213. The next prime is 5821229. The reversal of 5821215 is 5121285.

5821215 = 1077² + 1078² + ... + 1081².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5821215 - 2¹ = 5821213 is a prime.

5821215 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5821213) 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 7 ways as a sum of consecutive naturals, for example, 194026 + ... + 194055.

It is an arithmetic number, because the mean of its divisors is an integer number (1164246).

Almost surely, 2^5821215 is an apocalyptic number.

5821215 is a deficient number, since it is larger than the sum of its proper divisors (3492753).

5821215 is a wasteful number, since it uses less digits than its factorization.

5821215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388089.

The product of its digits is 800, while the sum is 24.

The square root of 5821215 is about 2412.7194200735. The cubic root of 5821215 is about 179.8889747428. Note that the first 3 decimals are identical.

The spelling of 5821215 in words is "five million, eight hundred twenty-one thousand, two hundred fifteen".