6216985 has 8 divisors (see below), whose sum is σ = 7899336. Its totient is φ = 4680960.

The previous prime is 6216979. The next prime is 6216989. The reversal of 6216985 is 5896126.

6216985 = 411² + 412² + ... + 444².

6216985 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 4 ways, for example, as 2343961 + 3873024 = 1531^2 + 1968^2 .

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

It is not a de Polignac number, because 6216985 - 2¹¹ = 6214937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6216989) 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, 36486 + ... + 36655.

It is an arithmetic number, because the mean of its divisors is an integer number (987417).

Almost surely, 2^6216985 is an apocalyptic number.

It is an amenable number.

6216985 is a deficient number, since it is larger than the sum of its proper divisors (1682351).

6216985 is a wasteful number, since it uses less digits than its factorization.

6216985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73163.

The product of its digits is 25920, while the sum is 37.

The square root of 6216985 is about 2493.3882569708. The cubic root of 6216985 is about 183.8766600153.

The spelling of 6216985 in words is "six million, two hundred sixteen thousand, nine hundred eighty-five".