1143155515 has 16 divisors (see below), whose sum is σ = 1410429888. Its totient is φ = 888817536.

The previous prime is 1143155483. The next prime is 1143155527. The reversal of 1143155515 is 5155513411.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1143155515 - 2⁵ = 1143155483 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193749 + ... + 199561.

It is an arithmetic number, because the mean of its divisors is an integer number (88151868).

Almost surely, 2^1143155515 is an apocalyptic number.

1143155515 is a deficient number, since it is larger than the sum of its proper divisors (267274373).

1143155515 is a wasteful number, since it uses less digits than its factorization.

1143155515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6918.

The product of its digits is 7500, while the sum is 31.

The square root of 1143155515 is about 33810.5828846531. The cubic root of 1143155515 is about 1045.6068954730.

Adding to 1143155515 its reverse (5155513411), we get a palindrome (6298668926).

The spelling of 1143155515 in words is "one billion, one hundred forty-three million, one hundred fifty-five thousand, five hundred fifteen".