1222215706 has 8 divisors (see below), whose sum is σ = 1836676800. Its totient is φ = 609990108.

The previous prime is 1222215689. The next prime is 1222215727. The reversal of 1222215706 is 6075122221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1222215706² = 2987622463986156872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557506 + ... + 559693.

It is an arithmetic number, because the mean of its divisors is an integer number (229584600).

Almost surely, 2^1222215706 is an apocalyptic number.

1222215706 is a deficient number, since it is larger than the sum of its proper divisors (614461094).

1222215706 is a wasteful number, since it uses less digits than its factorization.

1222215706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117748.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1222215706 is about 34960.2017442692. The cubic root of 1222215706 is about 1069.1762099037.

Adding to 1222215706 its reverse (6075122221), we get a palindrome (7297337927).

The spelling of 1222215706 in words is "one billion, two hundred twenty-two million, two hundred fifteen thousand, seven hundred six".