1215051315 has 8 divisors (see below), whose sum is σ = 1944082128. Its totient is φ = 648027360.

The previous prime is 1215051287. The next prime is 1215051361. The reversal of 1215051315 is 5131505121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1215051315 - 2⁵ = 1215051283 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40501696 + ... + 40501725.

It is an arithmetic number, because the mean of its divisors is an integer number (243010266).

Almost surely, 2^1215051315 is an apocalyptic number.

1215051315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1215051315 is a deficient number, since it is larger than the sum of its proper divisors (729030813).

1215051315 is an equidigital number, since it uses as much as digits as its factorization.

1215051315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81003429.

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

The square root of 1215051315 is about 34857.5861900964. The cubic root of 1215051315 is about 1067.0830135207.

Adding to 1215051315 its reverse (5131505121), we get a palindrome (6346556436).

The spelling of 1215051315 in words is "one billion, two hundred fifteen million, fifty-one thousand, three hundred fifteen".