1215864233 has 2 divisors, whose sum is σ = 1215864234. Its totient is φ = 1215864232.

The previous prime is 1215864229. The next prime is 1215864257. The reversal of 1215864233 is 3324685121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1029896464 + 185967769 = 32092^2 + 13637^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215864233 - 2² = 1215864229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1215864193 and 1215864202.

It is not a weakly prime, because it can be changed into another prime (1215834233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607932116 + 607932117.

It is an arithmetic number, because the mean of its divisors is an integer number (607932117).

Almost surely, 2^1215864233 is an apocalyptic number.

It is an amenable number.

1215864233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215864233 is an equidigital number, since it uses as much as digits as its factorization.

1215864233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 35.

The square root of 1215864233 is about 34869.2448011138. The cubic root of 1215864233 is about 1067.3209342289.

The spelling of 1215864233 in words is "one billion, two hundred fifteen million, eight hundred sixty-four thousand, two hundred thirty-three".