6221986913 has 4 divisors (see below), whose sum is σ = 6227712000. Its totient is φ = 6216261828.

The previous prime is 6221986891. The next prime is 6221986951. The reversal of 6221986913 is 3196891226.

6221986913 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 6221986913 - 2²⁰ = 6220938337 is a prime.

It is a super-2 number, since 2×6221986913² = 77426242291086539138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6221986513) 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, 2860913 + ... + 2863086.

It is an arithmetic number, because the mean of its divisors is an integer number (1556928000).

Almost surely, 2^6221986913 is an apocalyptic number.

It is an amenable number.

6221986913 is a deficient number, since it is larger than the sum of its proper divisors (5725087).

6221986913 is a wasteful number, since it uses less digits than its factorization.

6221986913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5725086.

The product of its digits is 279936, while the sum is 47.

The square root of 6221986913 is about 78879.5722161321. The cubic root of 6221986913 is about 1839.2595982367.

The spelling of 6221986913 in words is "six billion, two hundred twenty-one million, nine hundred eighty-six thousand, nine hundred thirteen".