43042031031313 has 4 divisors (see below), whose sum is σ = 44526238997940. Its totient is φ = 41557823064688.

The previous prime is 43042031031289. The next prime is 43042031031317. The reversal of 43042031031313 is 31313013024034.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30253883124609 + 12788147906704 = 5500353^2 + 3576052^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43042031031313 is a prime.

It is a super-2 number, since 2×43042031031313² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43042031031317) 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, 742103983270 + ... + 742103983327.

It is an arithmetic number, because the mean of its divisors is an integer number (11131559749485).

Almost surely, 2^{43042031031313} is an apocalyptic number.

It is an amenable number.

43042031031313 is a deficient number, since it is larger than the sum of its proper divisors (1484207966627).

43042031031313 is a wasteful number, since it uses less digits than its factorization.

43042031031313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484207966626.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 43042031031313 its reverse (31313013024034), we get a palindrome (74355044055347).

The spelling of 43042031031313 in words is "forty-three trillion, forty-two billion, thirty-one million, thirty-one thousand, three hundred thirteen".