1222345559 has 4 divisors (see below), whose sum is σ = 1222417416. Its totient is φ = 1222273704.

The previous prime is 1222345529. The next prime is 1222345573. The reversal of 1222345559 is 9555432221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9555432221 = 82633 ⋅115637.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222345559 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222345529) 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, 5552 + ... + 49754.

It is an arithmetic number, because the mean of its divisors is an integer number (305604354).

Almost surely, 2^1222345559 is an apocalyptic number.

1222345559 is a deficient number, since it is larger than the sum of its proper divisors (71857).

1222345559 is an equidigital number, since it uses as much as digits as its factorization.

1222345559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71856.

The product of its digits is 108000, while the sum is 38.

The square root of 1222345559 is about 34962.0588495586. The cubic root of 1222345559 is about 1069.2140730570.

The spelling of 1222345559 in words is "one billion, two hundred twenty-two million, three hundred forty-five thousand, five hundred fifty-nine".