5561221501 has 8 divisors (see below), whose sum is σ = 6105430944. Its totient is φ = 5023452720.

The previous prime is 5561221487. The next prime is 5561221507. The reversal of 5561221501 is 1051221655.

5561221501 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5561221501 - 2¹⁹ = 5560697213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5561221501.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1608355 + ... + 1611808.

It is an arithmetic number, because the mean of its divisors is an integer number (763178868).

Almost surely, 2^5561221501 is an apocalyptic number.

It is an amenable number.

5561221501 is a deficient number, since it is larger than the sum of its proper divisors (544209443).

5561221501 is a wasteful number, since it uses less digits than its factorization.

5561221501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220331.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 5561221501 is about 74573.5978815559. The cubic root of 5561221501 is about 1771.6995072814.

The spelling of 5561221501 in words is "five billion, five hundred sixty-one million, two hundred twenty-one thousand, five hundred one".