2221501305 has 16 divisors (see below), whose sum is σ = 3555249984. Its totient is φ = 1184518080.

The previous prime is 2221501283. The next prime is 2221501309. The reversal of 2221501305 is 5031051222.

2221501305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2221501305 - 2⁶ = 2221501241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221501309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57682 + ... + 88148.

It is an arithmetic number, because the mean of its divisors is an integer number (222203124).

Almost surely, 2^2221501305 is an apocalyptic number.

It is an amenable number.

2221501305 is a deficient number, since it is larger than the sum of its proper divisors (1333748679).

2221501305 is a wasteful number, since it uses less digits than its factorization.

2221501305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35336.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2221501305 is about 47132.8049770009. The cubic root of 2221501305 is about 1304.8147503518.

Adding to 2221501305 its reverse (5031051222), we get a palindrome (7252552527).

The spelling of 2221501305 in words is "two billion, two hundred twenty-one million, five hundred one thousand, three hundred five".