6221396524 has 72 divisors (see below), whose sum is σ = 13135143840. Its totient is φ = 2568754944.

The previous prime is 6221396509. The next prime is 6221396543. The reversal of 6221396524 is 4256931226.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 742792 + ... + 751120.

Almost surely, 2^6221396524 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 6221396524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6567571920).

6221396524 is an abundant number, since it is smaller than the sum of its proper divisors (6913747316).

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

6221396524 is a wasteful number, since it uses less digits than its factorization.

6221396524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8487 (or 8478 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The square root of 6221396524 is about 78875.8297832739. The cubic root of 6221396524 is about 1839.2014221269.

The spelling of 6221396524 in words is "six billion, two hundred twenty-one million, three hundred ninety-six thousand, five hundred twenty-four".