1216056515 has 8 divisors (see below), whose sum is σ = 1494859968. Its totient is φ = 949117120.

The previous prime is 1216056509. The next prime is 1216056551. The reversal of 1216056515 is 5156506121.

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

It is not a de Polignac number, because 1216056515 - 2⁶ = 1216056451 is a prime.

It is a Duffinian number.

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, 2965787 + ... + 2966196.

It is an arithmetic number, because the mean of its divisors is an integer number (186857496).

Almost surely, 2^1216056515 is an apocalyptic number.

1216056515 is a deficient number, since it is larger than the sum of its proper divisors (278803453).

1216056515 is an equidigital number, since it uses as much as digits as its factorization.

1216056515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932029.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 1216056515 is about 34872.0018782977. The cubic root of 1216056515 is about 1067.3771948378.

The spelling of 1216056515 in words is "one billion, two hundred sixteen million, fifty-six thousand, five hundred fifteen".