1215152505 has 96 divisors (see below), whose sum is σ = 2549514240. Its totient is φ = 523013760.

The previous prime is 1215152479. The next prime is 1215152531. The reversal of 1215152505 is 5052515121.

1215152505 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 152 + 505 = 666.

It is an interprime number because it is at equal distance from previous prime (1215152479) and next prime (1215152531).

It is not a de Polignac number, because 1215152505 - 2⁶ = 1215152441 is a prime.

It is a super-2 number, since 2×1215152505² = 2953191220815550050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1142604 + ... + 1143666.

It is an arithmetic number, because the mean of its divisors is an integer number (26557440).

Almost surely, 2^1215152505 is an apocalyptic number.

1215152505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215152505 is an abundant number, since it is smaller than the sum of its proper divisors (1334361735).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215152505 is a wasteful number, since it uses less digits than its factorization.

1215152505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1288 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 1215152505 is about 34859.0376373187. The cubic root of 1215152505 is about 1067.1126350770.

Adding to 1215152505 its reverse (5052515121), we get a palindrome (6267667626).

The spelling of 1215152505 in words is "one billion, two hundred fifteen million, one hundred fifty-two thousand, five hundred five".