2221139717 has 4 divisors (see below), whose sum is σ = 2222115756. Its totient is φ = 2220163680.

The previous prime is 2221139707. The next prime is 2221139731. The reversal of 2221139717 is 7179311222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1311453796 + 909685921 = 36214^2 + 30161^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221139717 - 2⁸ = 2221139461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221139707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484598 + ... + 489159.

It is an arithmetic number, because the mean of its divisors is an integer number (555528939).

Almost surely, 2^2221139717 is an apocalyptic number.

It is an amenable number.

2221139717 is a deficient number, since it is larger than the sum of its proper divisors (976039).

2221139717 is an equidigital number, since it uses as much as digits as its factorization.

2221139717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976038.

The product of its digits is 10584, while the sum is 35.

The square root of 2221139717 is about 47128.9689787502. The cubic root of 2221139717 is about 1304.7439527407.

The spelling of 2221139717 in words is "two billion, two hundred twenty-one million, one hundred thirty-nine thousand, seven hundred seventeen".