1216141530 has 64 divisors (see below), whose sum is σ = 3004259328. Its totient is φ = 314841600.

The previous prime is 1216141519. The next prime is 1216141541. The reversal of 1216141530 is 351416121.

It is a happy number.

1216141530 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1216141519) and next prime (1216141541).

It is a self number, because there is not a number n which added to its sum of digits gives 1216141530.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 666199 + ... + 668021.

It is an arithmetic number, because the mean of its divisors is an integer number (46941552).

Almost surely, 2^1216141530 is an apocalyptic number.

1216141530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216141530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1502129664).

1216141530 is an abundant number, since it is smaller than the sum of its proper divisors (1788117798).

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

1216141530 is a wasteful number, since it uses less digits than its factorization.

1216141530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1216141530 is about 34873.2208148315. The cubic root of 1216141530 is about 1067.4020678478.

Adding to 1216141530 its reverse (351416121), we get a palindrome (1567557651).

The spelling of 1216141530 in words is "one billion, two hundred sixteen million, one hundred forty-one thousand, five hundred thirty".