1131513506 has 16 divisors (see below), whose sum is σ = 1797774264. Its totient is φ = 532280064.

The previous prime is 1131513499. The next prime is 1131513529. The reversal of 1131513506 is 6053151311.

It can be written as a sum of positive squares in 4 ways, for example, as 1083002281 + 48511225 = 32909^2 + 6965^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132296 + ... + 140588.

Almost surely, 2^1131513506 is an apocalyptic number.

1131513506 is a deficient number, since it is larger than the sum of its proper divisors (666260758).

1131513506 is a wasteful number, since it uses less digits than its factorization.

1131513506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12325.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 1131513506 is about 33637.9771389422. The cubic root of 1131513506 is about 1042.0452558744.

Adding to 1131513506 its reverse (6053151311), we get a palindrome (7184664817).

The spelling of 1131513506 in words is "one billion, one hundred thirty-one million, five hundred thirteen thousand, five hundred six".