1031440343 has 4 divisors (see below), whose sum is σ = 1032712968. Its totient is φ = 1030167720.

The previous prime is 1031440259. The next prime is 1031440349. The reversal of 1031440343 is 3430441301.

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 1031440343 - 2¹⁰ = 1031439319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031440349) 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, 635096 + ... + 636717.

It is an arithmetic number, because the mean of its divisors is an integer number (258178242).

Almost surely, 2^1031440343 is an apocalyptic number.

1031440343 is a deficient number, since it is larger than the sum of its proper divisors (1272625).

1031440343 is an equidigital number, since it uses as much as digits as its factorization.

1031440343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272624.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1031440343 is about 32116.0449464127. The cubic root of 1031440343 is about 1010.3721606649.

Adding to 1031440343 its reverse (3430441301), we get a palindrome (4461881644).

The spelling of 1031440343 in words is "one billion, thirty-one million, four hundred forty thousand, three hundred forty-three".