1131643432 has 8 divisors (see below), whose sum is σ = 2121831450. Its totient is φ = 565821712.

The previous prime is 1131643417. The next prime is 1131643433. The reversal of 1131643432 is 2343461311.

It can be written as a sum of positive squares in only one way, i.e., 1123992676 + 7650756 = 33526^2 + 2766^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1131643432.

It is not an unprimeable number, because it can be changed into a prime (1131643433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70727707 + ... + 70727722.

Almost surely, 2^1131643432 is an apocalyptic number.

It is an amenable number.

1131643432 is a deficient number, since it is larger than the sum of its proper divisors (990188018).

1131643432 is a wasteful number, since it uses less digits than its factorization.

1131643432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141455435 (or 141455431 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 1131643432 is about 33639.9083232996. The cubic root of 1131643432 is about 1042.0851386183.

The spelling of 1131643432 in words is "one billion, one hundred thirty-one million, six hundred forty-three thousand, four hundred thirty-two".