1216313459 has 2 divisors, whose sum is σ = 1216313460. Its totient is φ = 1216313458.

The previous prime is 1216313429. The next prime is 1216313471. The reversal of 1216313459 is 9543136121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1216313459 - 2¹² = 1216309363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216313419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608156729 + 608156730.

It is an arithmetic number, because the mean of its divisors is an integer number (608156730).

Almost surely, 2^1216313459 is an apocalyptic number.

1216313459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216313459 is an equidigital number, since it uses as much as digits as its factorization.

1216313459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 1216313459 is about 34875.6857853720. The cubic root of 1216313459 is about 1067.4523659198.

The spelling of 1216313459 in words is "one billion, two hundred sixteen million, three hundred thirteen thousand, four hundred fifty-nine".