1222571717 has 4 divisors (see below), whose sum is σ = 1230358956. Its totient is φ = 1214784480.

The previous prime is 1222571687. The next prime is 1222571731. The reversal of 1222571717 is 7171752221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7171752221 = 641 ⋅11188381.

It can be written as a sum of positive squares in 2 ways, for example, as 234978241 + 987593476 = 15329^2 + 31426^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222571717 - 2⁶ = 1222571653 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 (1222571767) 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, 3893384 + ... + 3893697.

It is an arithmetic number, because the mean of its divisors is an integer number (307589739).

Almost surely, 2^1222571717 is an apocalyptic number.

It is an amenable number.

1222571717 is a deficient number, since it is larger than the sum of its proper divisors (7787239).

1222571717 is an equidigital number, since it uses as much as digits as its factorization.

1222571717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7787238.

The product of its digits is 13720, while the sum is 35.

The square root of 1222571717 is about 34965.2930346651. The cubic root of 1222571717 is about 1069.2800108771.

The spelling of 1222571717 in words is "one billion, two hundred twenty-two million, five hundred seventy-one thousand, seven hundred seventeen".