1131111232 has 14 divisors (see below), whose sum is σ = 2244548978. Its totient is φ = 565555584.

The previous prime is 1131111217. The next prime is 1131111257. The reversal of 1131111232 is 2321111311.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 763085376 + 368025856 = 27624^2 + 19184^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 8836743 + ... + 8836870.

It is an arithmetic number, because the mean of its divisors is an integer number (160324927).

Almost surely, 2^1131111232 is an apocalyptic number.

It is an amenable number.

1131111232 is a deficient number, since it is larger than the sum of its proper divisors (1113437746).

1131111232 is an equidigital number, since it uses as much as digits as its factorization.

1131111232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17673625 (or 17673615 counting only the distinct ones).

The product of its digits is 36, while the sum is 16.

The square root of 1131111232 is about 33631.9971455755. The cubic root of 1131111232 is about 1041.9217524437.

Adding to 1131111232 its reverse (2321111311), we get a palindrome (3452222543).

The spelling of 1131111232 in words is "one billion, one hundred thirty-one million, one hundred eleven thousand, two hundred thirty-two".