1232215656 has 64 divisors (see below), whose sum is σ = 3587068800. Its totient is φ = 345416448.

The previous prime is 1232215631. The next prime is 1232215661. The reversal of 1232215656 is 6565122321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60291 + ... + 78098.

It is an arithmetic number, because the mean of its divisors is an integer number (56047950).

Almost surely, 2^1232215656 is an apocalyptic number.

It is an amenable number.

1232215656 is an abundant number, since it is smaller than the sum of its proper divisors (2354853144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1232215656 is a wasteful number, since it uses less digits than its factorization.

1232215656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138458 (or 138454 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 1232215656 is about 35102.9294504034. The cubic root of 1232215656 is about 1072.0842293846.

Adding to 1232215656 its reverse (6565122321), we get a palindrome (7797337977).

The spelling of 1232215656 in words is "one billion, two hundred thirty-two million, two hundred fifteen thousand, six hundred fifty-six".