1215484331 has 2 divisors, whose sum is σ = 1215484332. Its totient is φ = 1215484330.

The previous prime is 1215484313. The next prime is 1215484339. The reversal of 1215484331 is 1334845121.

Together with previous prime (1215484313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215484331 - 2⁶ = 1215484267 is a prime.

It is a super-2 number, since 2×1215484331² = 2954804317813035122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1215484339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607742165 + 607742166.

It is an arithmetic number, because the mean of its divisors is an integer number (607742166).

Almost surely, 2^1215484331 is an apocalyptic number.

1215484331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215484331 is an equidigital number, since it uses as much as digits as its factorization.

1215484331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 1215484331 is about 34863.7968528960. The cubic root of 1215484331 is about 1067.2097596462.

The spelling of 1215484331 in words is "one billion, two hundred fifteen million, four hundred eighty-four thousand, three hundred thirty-one".