43440313 has 6 divisors (see below), whose sum is σ = 50532666. Its totient is φ = 37234512.

The previous prime is 43440263. The next prime is 43440317. The reversal of 43440313 is 31304434.

It can be written as a sum of positive squares in only one way, i.e., 41835024 + 1605289 = 6468^2 + 1267^2 .

It is a de Polignac number, because none of the positive numbers 2^k-43440313 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 (43440317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 443220 + ... + 443317.

It is an arithmetic number, because the mean of its divisors is an integer number (8422111).

Almost surely, 2^43440313 is an apocalyptic number.

It is an amenable number.

43440313 is a deficient number, since it is larger than the sum of its proper divisors (7092353).

43440313 is an equidigital number, since it uses as much as digits as its factorization.

43440313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886551 (or 886544 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 43440313 is about 6590.9265661210. The cubic root of 43440313 is about 351.5315550033.

Adding to 43440313 its reverse (31304434), we get a palindrome (74744747).

The spelling of 43440313 in words is "forty-three million, four hundred forty thousand, three hundred thirteen".