1215368715 has 16 divisors (see below), whose sum is σ = 2121371136. Its totient is φ = 589269600.

The previous prime is 1215368701. The next prime is 1215368747. The reversal of 1215368715 is 5178635121.

It is not a de Polignac number, because 1215368715 - 2¹⁰ = 1215367691 is a prime.

It is a super-2 number, since 2×1215368715² = 2954242226801502450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3682771 + ... + 3683100.

It is an arithmetic number, because the mean of its divisors is an integer number (132585696).

Almost surely, 2^1215368715 is an apocalyptic number.

1215368715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1215368715 is a deficient number, since it is larger than the sum of its proper divisors (906002421).

1215368715 is a wasteful number, since it uses less digits than its factorization.

1215368715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7365890.

The product of its digits is 50400, while the sum is 39.

The square root of 1215368715 is about 34862.1387037571. The cubic root of 1215368715 is about 1067.1759211637.

The spelling of 1215368715 in words is "one billion, two hundred fifteen million, three hundred sixty-eight thousand, seven hundred fifteen".