1131440431 has 8 divisors (see below), whose sum is σ = 1234601424. Its totient is φ = 1028329920.

The previous prime is 1131440417. The next prime is 1131440441. The reversal of 1131440431 is 1340441311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131440431 - 2⁵ = 1131440399 is a prime.

It is a super-2 number, since 2×1131440431² = 2560314897802931522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131440441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46185 + ... + 66301.

It is an arithmetic number, because the mean of its divisors is an integer number (154325178).

Almost surely, 2^1131440431 is an apocalyptic number.

1131440431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131440431 is a deficient number, since it is larger than the sum of its proper divisors (103160993).

1131440431 is a wasteful number, since it uses less digits than its factorization.

1131440431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25241.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1131440431 is about 33636.8909235084. The cubic root of 1131440431 is about 1042.0228230603.

Adding to 1131440431 its reverse (1340441311), we get a palindrome (2471881742).

The spelling of 1131440431 in words is "one billion, one hundred thirty-one million, four hundred forty thousand, four hundred thirty-one".