1216070500 has 48 divisors (see below), whose sum is σ = 2692360944. Its totient is φ = 479750400.

The previous prime is 1216070491. The next prime is 1216070501. The reversal of 1216070500 is 50706121.

It can be written as a sum of positive squares in 8 ways, for example, as 468376164 + 747694336 = 21642^2 + 27344^2 .

It is not an unprimeable number, because it can be changed into a prime (1216070501) 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, 19842 + ... + 53158.

It is an arithmetic number, because the mean of its divisors is an integer number (56090853).

Almost surely, 2^1216070500 is an apocalyptic number.

1216070500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216070500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346180472).

1216070500 is an abundant number, since it is smaller than the sum of its proper divisors (1476290444).

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

1216070500 is a wasteful number, since it uses less digits than its factorization.

1216070500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33409 (or 33397 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 1216070500 is about 34872.2023967515. The cubic root of 1216070500 is about 1067.3812865371.

Adding to 1216070500 its reverse (50706121), we get a palindrome (1266776621).

The spelling of 1216070500 in words is "one billion, two hundred sixteen million, seventy thousand, five hundred".