1215305222 has 4 divisors (see below), whose sum is σ = 1822957836. Its totient is φ = 607652610.

The previous prime is 1215305159. The next prime is 1215305237. The reversal of 1215305222 is 2225035121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2225035121 = 29 ⋅76725349.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303826304 + ... + 303826307.

It is an arithmetic number, because the mean of its divisors is an integer number (455739459).

Almost surely, 2^1215305222 is an apocalyptic number.

1215305222 is a deficient number, since it is larger than the sum of its proper divisors (607652614).

1215305222 is an equidigital number, since it uses as much as digits as its factorization.

1215305222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607652613.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1215305222 is about 34861.2280621323. The cubic root of 1215305222 is about 1067.1573371242.

The spelling of 1215305222 in words is "one billion, two hundred fifteen million, three hundred five thousand, two hundred twenty-two".