1215512067 has 16 divisors (see below), whose sum is σ = 2020591872. Its totient is φ = 631434720.

The previous prime is 1215512063. The next prime is 1215512069. The reversal of 1215512067 is 7602155121.

It is not a de Polignac number, because 1215512067 - 2² = 1215512063 is a prime.

It is a super-2 number, since 2×1215512067² = 2954939170045224978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1215512063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2630748 + ... + 2631209.

It is an arithmetic number, because the mean of its divisors is an integer number (126286992).

Almost surely, 2^1215512067 is an apocalyptic number.

1215512067 is a deficient number, since it is larger than the sum of its proper divisors (805079805).

1215512067 is a wasteful number, since it uses less digits than its factorization.

1215512067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261978.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 1215512067 is about 34864.1946271529. The cubic root of 1215512067 is about 1067.2178770976.

Adding to 1215512067 its reverse (7602155121), we get a palindrome (8817667188).

The spelling of 1215512067 in words is "one billion, two hundred fifteen million, five hundred twelve thousand, sixty-seven".