2221711817 has 4 divisors (see below), whose sum is σ = 2392612740. Its totient is φ = 2050810896.

The previous prime is 2221711777. The next prime is 2221711853. The reversal of 2221711817 is 7181171222.

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 1240518841 + 981192976 = 35221^2 + 31324^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221711817 - 2¹⁸ = 2221449673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221711117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85450442 + ... + 85450467.

It is an arithmetic number, because the mean of its divisors is an integer number (598153185).

Almost surely, 2^2221711817 is an apocalyptic number.

It is an amenable number.

2221711817 is a deficient number, since it is larger than the sum of its proper divisors (170900923).

2221711817 is a wasteful number, since it uses less digits than its factorization.

2221711817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170900922.

The product of its digits is 3136, while the sum is 32.

The square root of 2221711817 is about 47135.0381033048. The cubic root of 2221711817 is about 1304.8559642952.

The spelling of 2221711817 in words is "two billion, two hundred twenty-one million, seven hundred eleven thousand, eight hundred seventeen".