1143215515 has 8 divisors (see below), whose sum is σ = 1477386288. Its totient is φ = 844220640.

The previous prime is 1143215471. The next prime is 1143215531. The reversal of 1143215515 is 5155123411.

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

It is not a de Polignac number, because 1143215515 - 2²³ = 1134826907 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, 8793901 + ... + 8794030.

It is an arithmetic number, because the mean of its divisors is an integer number (184673286).

Almost surely, 2^1143215515 is an apocalyptic number.

1143215515 is a deficient number, since it is larger than the sum of its proper divisors (334170773).

1143215515 is a wasteful number, since it uses less digits than its factorization.

1143215515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17587949.

The product of its digits is 3000, while the sum is 28.

The square root of 1143215515 is about 33811.4701691601. The cubic root of 1143215515 is about 1045.6251884977.

Adding to 1143215515 its reverse (5155123411), we get a palindrome (6298338926).

The spelling of 1143215515 in words is "one billion, one hundred forty-three million, two hundred fifteen thousand, five hundred fifteen".