43042313 has 2 divisors, whose sum is σ = 43042314. Its totient is φ = 43042312.

The previous prime is 43042309. The next prime is 43042327. The reversal of 43042313 is 31324034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40094224 + 2948089 = 6332^2 + 1717^2 .

It is a cyclic number.

It is not a de Polignac number, because 43042313 - 2² = 43042309 is a prime.

It is not a weakly prime, because it can be changed into another prime (43012313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21521156 + 21521157.

It is an arithmetic number, because the mean of its divisors is an integer number (21521157).

Almost surely, 2^43042313 is an apocalyptic number.

It is an amenable number.

43042313 is a deficient number, since it is larger than the sum of its proper divisors (1).

43042313 is an equidigital number, since it uses as much as digits as its factorization.

43042313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 43042313 is about 6560.6640669981. The cubic root of 43042313 is about 350.4546825387.

Adding to 43042313 its reverse (31324034), we get a palindrome (74366347).

The spelling of 43042313 in words is "forty-three million, forty-two thousand, three hundred thirteen".