6221616 has 40 divisors (see below), whose sum is σ = 16171584. Its totient is φ = 2061120.

The previous prime is 6221591. The next prime is 6221629. The reversal of 6221616 is 6161226.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10611 + ... + 11181.

Almost surely, 2^6221616 is an apocalyptic number.

It is an amenable number.

6221616 is an abundant number, since it is smaller than the sum of its proper divisors (9949968).

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

6221616 is a wasteful number, since it uses less digits than its factorization.

6221616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 803 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 6221616 is about 2494.3167401114. The cubic root of 6221616 is about 183.9223049416.

The spelling of 6221616 in words is "six million, two hundred twenty-one thousand, six hundred sixteen".