1213422664 has 16 divisors (see below), whose sum is σ = 2298624300. Its totient is φ = 600456192.

The previous prime is 1213422653. The next prime is 1213422667. The reversal of 1213422664 is 4662243121.

It can be written as a sum of positive squares in 2 ways, for example, as 1213128900 + 293764 = 34830^2 + 542^2 .

It is not an unprimeable number, because it can be changed into a prime (1213422667) 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, 781069 + ... + 782620.

Almost surely, 2^1213422664 is an apocalyptic number.

It is an amenable number.

1213422664 is a deficient number, since it is larger than the sum of its proper divisors (1085201636).

1213422664 is a wasteful number, since it uses less digits than its factorization.

1213422664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563792 (or 1563788 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 1213422664 is about 34834.2168564186. The cubic root of 1213422664 is about 1066.6060287578.

Adding to 1213422664 its reverse (4662243121), we get a palindrome (5875665785).

The spelling of 1213422664 in words is "one billion, two hundred thirteen million, four hundred twenty-two thousand, six hundred sixty-four".