1215531283 has 2 divisors, whose sum is σ = 1215531284. Its totient is φ = 1215531282.

The previous prime is 1215531271. The next prime is 1215531287. The reversal of 1215531283 is 3821355121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215531283 - 2¹³ = 1215523091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215531287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607765641 + 607765642.

It is an arithmetic number, because the mean of its divisors is an integer number (607765642).

Almost surely, 2^1215531283 is an apocalyptic number.

1215531283 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215531283 is an equidigital number, since it uses as much as digits as its factorization.

1215531283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 1215531283 is about 34864.4702096561. The cubic root of 1215531283 is about 1067.2235009416.

The spelling of 1215531283 in words is "one billion, two hundred fifteen million, five hundred thirty-one thousand, two hundred eighty-three".