1216919050 has 12 divisors (see below), whose sum is σ = 2263469526. Its totient is φ = 486767600.

The previous prime is 1216919047. The next prime is 1216919051. The reversal of 1216919050 is 509196121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1147380129 + 69538921 = 33873^2 + 8339^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1216918997 and 1216919015.

It is not an unprimeable number, because it can be changed into a prime (1216919051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12169141 + ... + 12169240.

Almost surely, 2^1216919050 is an apocalyptic number.

1216919050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216919050 is a deficient number, since it is larger than the sum of its proper divisors (1046550476).

1216919050 is a wasteful number, since it uses less digits than its factorization.

1216919050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24338393 (or 24338388 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 34.

The square root of 1216919050 is about 34884.3668424697. The cubic root of 1216919050 is about 1067.6294946814.

The spelling of 1216919050 in words is "one billion, two hundred sixteen million, nine hundred nineteen thousand, fifty".