1131856043 has 4 divisors (see below), whose sum is σ = 1143524760. Its totient is φ = 1120187328.

The previous prime is 1131856031. The next prime is 1131856057. The reversal of 1131856043 is 3406581311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131856043 - 2¹⁶ = 1131790507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131856003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5834213 + ... + 5834406.

It is an arithmetic number, because the mean of its divisors is an integer number (285881190).

Almost surely, 2^1131856043 is an apocalyptic number.

1131856043 is a deficient number, since it is larger than the sum of its proper divisors (11668717).

1131856043 is an equidigital number, since it uses as much as digits as its factorization.

1131856043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11668716.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1131856043 is about 33643.0682756493. The cubic root of 1131856043 is about 1042.1503961848.

The spelling of 1131856043 in words is "one billion, one hundred thirty-one million, eight hundred fifty-six thousand, forty-three".