1040320331 has 4 divisors (see below), whose sum is σ = 1040985792. Its totient is φ = 1039654872.

The previous prime is 1040320327. The next prime is 1040320363. The reversal of 1040320331 is 1330230401.

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 1040320331 - 2² = 1040320327 is a prime.

It is a super-2 number, since 2×1040320331² = 2164532782183899122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040320031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330380 + ... + 333513.

It is an arithmetic number, because the mean of its divisors is an integer number (260246448).

Almost surely, 2^1040320331 is an apocalyptic number.

1040320331 is a deficient number, since it is larger than the sum of its proper divisors (665461).

1040320331 is an equidigital number, since it uses as much as digits as its factorization.

1040320331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665460.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1040320331 is about 32253.9971321385. The cubic root of 1040320331 is about 1013.2634144129.

Adding to 1040320331 its reverse (1330230401), we get a palindrome (2370550732).

The spelling of 1040320331 in words is "one billion, forty million, three hundred twenty thousand, three hundred thirty-one".