1216473515 has 8 divisors (see below), whose sum is σ = 1460019168. Its totient is φ = 973011520.

The previous prime is 1216473509. The next prime is 1216473541. The reversal of 1216473515 is 5153746121.

It is a happy number.

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

It is not a de Polignac number, because 1216473515 - 2¹⁸ = 1216211371 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, 17495 + ... + 52335.

It is an arithmetic number, because the mean of its divisors is an integer number (182502396).

Almost surely, 2^1216473515 is an apocalyptic number.

1216473515 is a deficient number, since it is larger than the sum of its proper divisors (243545653).

1216473515 is an equidigital number, since it uses as much as digits as its factorization.

1216473515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41829.

The product of its digits is 25200, while the sum is 35.

The square root of 1216473515 is about 34877.9803744426. The cubic root of 1216473515 is about 1067.4991862689.

The spelling of 1216473515 in words is "one billion, two hundred sixteen million, four hundred seventy-three thousand, five hundred fifteen".