1243306216 has 64 divisors (see below), whose sum is σ = 2486257920. Its totient is φ = 581644800.

The previous prime is 1243306189. The next prime is 1243306231. The reversal of 1243306216 is 6126033421.

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, 2027926 + ... + 2028538.

It is an arithmetic number, because the mean of its divisors is an integer number (38847780).

Almost surely, 2^1243306216 is an apocalyptic number.

It is an amenable number.

1243306216 is a deficient number, since it is larger than the sum of its proper divisors (1242951704).

1243306216 is a wasteful number, since it uses less digits than its factorization.

1243306216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1243306216 is about 35260.5475850844. The cubic root of 1243306216 is about 1075.2910597489.

Adding to 1243306216 its reverse (6126033421), we get a palindrome (7369339637).

The spelling of 1243306216 in words is "one billion, two hundred forty-three million, three hundred six thousand, two hundred sixteen".