1222209505 has 12 divisors (see below), whose sum is σ = 1612105236. Its totient is φ = 888879200.

The previous prime is 1222209487. The next prime is 1222209529. The reversal of 1222209505 is 5059022221.

It can be written as a sum of positive squares in 2 ways, for example, as 879478336 + 342731169 = 29656^2 + 18513^2 .

It is not a de Polignac number, because 1222209505 - 2²⁵ = 1188655073 is a prime.

It is a super-2 number, since 2×1222209505² = 2987592148224690050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1009486 + ... + 1010695.

It is an arithmetic number, because the mean of its divisors is an integer number (134342103).

Almost surely, 2^1222209505 is an apocalyptic number.

It is an amenable number.

1222209505 is a deficient number, since it is larger than the sum of its proper divisors (389895731).

1222209505 is a wasteful number, since it uses less digits than its factorization.

1222209505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020208 (or 2020197 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1222209505 is about 34960.1130575975. The cubic root of 1222209505 is about 1069.1744017197.

The spelling of 1222209505 in words is "one billion, two hundred twenty-two million, two hundred nine thousand, five hundred five".