6221519920 has 320 divisors, whose sum is σ = 19292193792. Its totient is φ = 1821388800.

The previous prime is 6221519879. The next prime is 6221519929. The reversal of 6221519920 is 299151226.

It is a super-2 number, since 2×6221519920² = 77414620229913612800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6221519920.

It is not an unprimeable number, because it can be changed into a prime (6221519929) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12670875 + ... + 12671365.

Almost surely, 2^6221519920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6221519920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9646096896).

6221519920 is an abundant number, since it is smaller than the sum of its proper divisors (13070673872).

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

6221519920 is a wasteful number, since it uses less digits than its factorization.

6221519920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 6221519920 is about 78876.6119962058. The cubic root of 6221519920 is about 1839.2135817011.

The spelling of 6221519920 in words is "six billion, two hundred twenty-one million, five hundred nineteen thousand, nine hundred twenty".