43040431023131 has 4 divisors (see below), whose sum is σ = 43040495305200. Its totient is φ = 43040366741064.

The previous prime is 43040431023127. The next prime is 43040431023133. The reversal of 43040431023131 is 13132013404034.

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 43040431023131 - 2² = 43040431023127 is a prime.

It is a super-2 number, since 2×43040431023131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43040431023094 and 43040431023103.

It is not an unprimeable number, because it can be changed into a prime (43040431023133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31126016 + ... + 32479373.

It is an arithmetic number, because the mean of its divisors is an integer number (10760123826300).

Almost surely, 2^{43040431023131} is an apocalyptic number.

43040431023131 is a deficient number, since it is larger than the sum of its proper divisors (64282069).

43040431023131 is an equidigital number, since it uses as much as digits as its factorization.

43040431023131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64282068.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 43040431023131 its reverse (13132013404034), we get a palindrome (56172444427165).

The spelling of 43040431023131 in words is "forty-three trillion, forty billion, four hundred thirty-one million, twenty-three thousand, one hundred thirty-one".