1043640331 has 4 divisors (see below), whose sum is σ = 1063331712. Its totient is φ = 1023948952.

The previous prime is 1043640329. The next prime is 1043640337. The reversal of 1043640331 is 1330463401.

It is a happy number.

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 1043640331 - 2¹ = 1043640329 is a prime.

It is a super-2 number, since 2×1043640331² = 2178370280979579122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1043640296 and 1043640305.

It is not an unprimeable number, because it can be changed into a prime (1043640337) 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, 9845611 + ... + 9845716.

It is an arithmetic number, because the mean of its divisors is an integer number (265832928).

Almost surely, 2^1043640331 is an apocalyptic number.

1043640331 is a deficient number, since it is larger than the sum of its proper divisors (19691381).

1043640331 is an equidigital number, since it uses as much as digits as its factorization.

1043640331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19691380.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 1043640331 is about 32305.4226253117. The cubic root of 1043640331 is about 1014.3401540130.

The spelling of 1043640331 in words is "one billion, forty-three million, six hundred forty thousand, three hundred thirty-one".