1515216515 has 8 divisors (see below), whose sum is σ = 1848067728. Its totient is φ = 1192301280.

The previous prime is 1515216487. The next prime is 1515216589. The reversal of 1515216515 is 5156125151.

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

It is not a de Polignac number, because 1515216515 - 2⁸ = 1515216259 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, 2483657 + ... + 2484266.

It is an arithmetic number, because the mean of its divisors is an integer number (231008466).

Almost surely, 2^1515216515 is an apocalyptic number.

1515216515 is a deficient number, since it is larger than the sum of its proper divisors (332851213).

1515216515 is an equidigital number, since it uses as much as digits as its factorization.

1515216515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967989.

The product of its digits is 7500, while the sum is 32.

The square root of 1515216515 is about 38925.7821372930. The cubic root of 1515216515 is about 1148.5720183763.

The spelling of 1515216515 in words is "one billion, five hundred fifteen million, two hundred sixteen thousand, five hundred fifteen".