1131544356 has 24 divisors (see below), whose sum is σ = 2654098944. Its totient is φ = 375205920.

The previous prime is 1131544343. The next prime is 1131544357. The reversal of 1131544356 is 6534451311.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1131544357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244555 + ... + 249138.

It is an arithmetic number, because the mean of its divisors is an integer number (110587456).

Almost surely, 2^1131544356 is an apocalyptic number.

It is an amenable number.

1131544356 is an abundant number, since it is smaller than the sum of its proper divisors (1522554588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131544356 is a wasteful number, since it uses less digits than its factorization.

1131544356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493891 (or 493889 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 1131544356 is about 33638.4356949012. The cubic root of 1131544356 is about 1042.0547260232.

Adding to 1131544356 its reverse (6534451311), we get a palindrome (7665995667).

The spelling of 1131544356 in words is "one billion, one hundred thirty-one million, five hundred forty-four thousand, three hundred fifty-six".