6216881 has 4 divisors (see below), whose sum is σ = 6782064. Its totient is φ = 5651700.

The previous prime is 6216841. The next prime is 6216887. The reversal of 6216881 is 1886126.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6216881 is a prime.

It is a super-2 number, since 2×6216881² = 77299218736322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6216887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282575 + ... + 282596.

It is an arithmetic number, because the mean of its divisors is an integer number (1695516).

Almost surely, 2^6216881 is an apocalyptic number.

It is an amenable number.

6216881 is a deficient number, since it is larger than the sum of its proper divisors (565183).

6216881 is a wasteful number, since it uses less digits than its factorization.

6216881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565182.

The product of its digits is 4608, while the sum is 32.

The square root of 6216881 is about 2493.3674017280. The cubic root of 6216881 is about 183.8756346909.

The spelling of 6216881 in words is "six million, two hundred sixteen thousand, eight hundred eighty-one".