1131533530 has 32 divisors (see below), whose sum is σ = 2160183168. Its totient is φ = 425832000.

The previous prime is 1131533527. The next prime is 1131533537. The reversal of 1131533530 is 353351311.

It is a junction number, because it is equal to n+sod(n) for n = 1131533495 and 1131533504.

It is not an unprimeable number, because it can be changed into a prime (1131533537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26296 + ... + 54355.

It is an arithmetic number, because the mean of its divisors is an integer number (67505724).

Almost surely, 2^1131533530 is an apocalyptic number.

1131533530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131533530 is a deficient number, since it is larger than the sum of its proper divisors (1028649638).

1131533530 is a wasteful number, since it uses less digits than its factorization.

1131533530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80742.

The product of its (nonzero) digits is 2025, while the sum is 25.

The square root of 1131533530 is about 33638.2747774020. The cubic root of 1131533530 is about 1042.0514027420.

Adding to 1131533530 its reverse (353351311), we get a palindrome (1484884841).

The spelling of 1131533530 in words is "one billion, one hundred thirty-one million, five hundred thirty-three thousand, five hundred thirty".