1215883297 has 2 divisors, whose sum is σ = 1215883298. Its totient is φ = 1215883296.

The previous prime is 1215883223. The next prime is 1215883303. The reversal of 1215883297 is 7923885121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1179510336 + 36372961 = 34344^2 + 6031^2 .

It is an emirp because it is prime and its reverse (7923885121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215883297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215883217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607941648 + 607941649.

It is an arithmetic number, because the mean of its divisors is an integer number (607941649).

Almost surely, 2^1215883297 is an apocalyptic number.

It is an amenable number.

1215883297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215883297 is an equidigital number, since it uses as much as digits as its factorization.

1215883297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 46.

The square root of 1215883297 is about 34869.5181641502. The cubic root of 1215883297 is about 1067.3265125107.

The spelling of 1215883297 in words is "one billion, two hundred fifteen million, eight hundred eighty-three thousand, two hundred ninety-seven".