1216343630 has 8 divisors (see below), whose sum is σ = 2189418552. Its totient is φ = 486537448.

The previous prime is 1216343603. The next prime is 1216343641. The reversal of 1216343630 is 363436121.

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

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1216343593 and 1216343602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60817172 + ... + 60817191.

It is an arithmetic number, because the mean of its divisors is an integer number (273677319).

Almost surely, 2^1216343630 is an apocalyptic number.

1216343630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216343630 is a deficient number, since it is larger than the sum of its proper divisors (973074922).

1216343630 is a wasteful number, since it uses less digits than its factorization.

1216343630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121634370.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 1216343630 is about 34876.1183333237. The cubic root of 1216343630 is about 1067.4611919996.

Adding to 1216343630 its reverse (363436121), we get a palindrome (1579779751).

The spelling of 1216343630 in words is "one billion, two hundred sixteen million, three hundred forty-three thousand, six hundred thirty".