1131031332 has 18 divisors (see below), whose sum is σ = 2858995958. Its totient is φ = 377010432.

The previous prime is 1131031283. The next prime is 1131031333. The reversal of 1131031332 is 2331301311.

It is a happy number.

1131031332 is a `hidden beast` number, since 11 + 310 + 313 + 32 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1082673216 + 48358116 = 32904^2 + 6954^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1131031333) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 15708733 + ... + 15708804.

Almost surely, 2^1131031332 is an apocalyptic number.

1131031332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1131031332 is an abundant number, since it is smaller than the sum of its proper divisors (1727964626).

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

1131031332 is a wasteful number, since it uses less digits than its factorization.

1131031332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31417547 (or 31417542 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1131031332 is about 33630.8092676938. The cubic root of 1131031332 is about 1041.8972186031.

Adding to 1131031332 its reverse (2331301311), we get a palindrome (3462332643).

The spelling of 1131031332 in words is "one billion, one hundred thirty-one million, thirty-one thousand, three hundred thirty-two".