1216503030 has 32 divisors (see below), whose sum is σ = 2921349888. Its totient is φ = 324207200.

The previous prime is 1216502999. The next prime is 1216503037. The reversal of 1216503030 is 303056121.

1216503030 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 = 1216502988 and 1216503006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216503037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43135 + ... + 65525.

It is an arithmetic number, because the mean of its divisors is an integer number (91292184).

Almost surely, 2^1216503030 is an apocalyptic number.

1216503030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216503030 is an abundant number, since it is smaller than the sum of its proper divisors (1704846858).

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

1216503030 is a wasteful number, since it uses less digits than its factorization.

1216503030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24212.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1216503030 is about 34878.4034898388. The cubic root of 1216503030 is about 1067.5078196898.

Adding to 1216503030 its reverse (303056121), we get a palindrome (1519559151).

The spelling of 1216503030 in words is "one billion, two hundred sixteen million, five hundred three thousand, thirty".