1215113569 has 2 divisors, whose sum is σ = 1215113570. Its totient is φ = 1215113568.

The previous prime is 1215113551. The next prime is 1215113587. The reversal of 1215113569 is 9653115121.

It is a balanced prime because it is at equal distance from previous prime (1215113551) and next prime (1215113587).

It can be written as a sum of positive squares in only one way, i.e., 680949025 + 534164544 = 26095^2 + 23112^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215113569 - 2⁹ = 1215113057 is a prime.

It is a super-2 number, since 2×1215113569² = 2953001971135835522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1215113869) 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, 607556784 + 607556785.

It is an arithmetic number, because the mean of its divisors is an integer number (607556785).

Almost surely, 2^1215113569 is an apocalyptic number.

It is an amenable number.

1215113569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215113569 is an equidigital number, since it uses as much as digits as its factorization.

1215113569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 34.

The square root of 1215113569 is about 34858.4791550062. The cubic root of 1215113569 is about 1067.1012374565.

The spelling of 1215113569 in words is "one billion, two hundred fifteen million, one hundred thirteen thousand, five hundred sixty-nine".