6221266520 has 64 divisors (see below), whose sum is σ = 16839532800. Its totient is φ = 2020740480.

The previous prime is 6221266489. The next prime is 6221266537. The reversal of 6221266520 is 256621226.

It is a super-2 number, since 2×6221266520² = 77408314225745820800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579386 + ... + 590025.

It is an arithmetic number, because the mean of its divisors is an integer number (263117700).

Almost surely, 2^6221266520 is an apocalyptic number.

It is an amenable number.

6221266520 is an abundant number, since it is smaller than the sum of its proper divisors (10618266280).

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

6221266520 is a wasteful number, since it uses less digits than its factorization.

6221266520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169448 (or 1169444 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 6221266520 is about 78875.0056735339. The cubic root of 6221266520 is about 1839.1886112193.

Adding to 6221266520 its reverse (256621226), we get a palindrome (6477887746).

The spelling of 6221266520 in words is "six billion, two hundred twenty-one million, two hundred sixty-six thousand, five hundred twenty".