1215013515 has 16 divisors (see below), whose sum is σ = 1954886400. Its totient is φ = 644385632.

The previous prime is 1215013489. The next prime is 1215013529. The reversal of 1215013515 is 5153105121.

It is a cyclic number.

It is not a de Polignac number, because 1215013515 - 2⁶ = 1215013451 is a prime.

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, 223575 + ... + 228944.

It is an arithmetic number, because the mean of its divisors is an integer number (122180400).

Almost surely, 2^1215013515 is an apocalyptic number.

1215013515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1215013515 is a deficient number, since it is larger than the sum of its proper divisors (739872885).

1215013515 is a wasteful number, since it uses less digits than its factorization.

1215013515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452706.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1215013515 is about 34857.0439796607. The cubic root of 1215013515 is about 1067.0719478272.

Adding to 1215013515 its reverse (5153105121), we get a palindrome (6368118636).

The spelling of 1215013515 in words is "one billion, two hundred fifteen million, thirteen thousand, five hundred fifteen".