5561221500 has 144 divisors (see below), whose sum is σ = 17629955616. Its totient is φ = 1475712000.

The previous prime is 5561221487. The next prime is 5561221507. The reversal of 5561221500 is 51221655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561221507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 946572 + ... + 952428.

Almost surely, 2^5561221500 is an apocalyptic number.

5561221500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5561221500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8814977808).

5561221500 is an abundant number, since it is smaller than the sum of its proper divisors (12068734116).

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

5561221500 is a wasteful number, since it uses less digits than its factorization.

5561221500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6093 (or 6078 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 5561221500 is about 74573.5978748511. The cubic root of 5561221500 is about 1771.6995071752.

The spelling of 5561221500 in words is "five billion, five hundred sixty-one million, two hundred twenty-one thousand, five hundred".