43131330442 has 4 divisors (see below), whose sum is σ = 64696995666. Its totient is φ = 21565665220.

The previous prime is 43131330419. The next prime is 43131330449. The reversal of 43131330442 is 24403313134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24403313134 = 2 ⋅12201656567.

It can be written as a sum of positive squares in only one way, i.e., 41233769721 + 1897560721 = 203061^2 + 43561^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 43131330442.

It is not an unprimeable number, because it can be changed into a prime (43131330449) 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 as a sum of consecutive naturals, namely, 10782832609 + ... + 10782832612.

Almost surely, 2^43131330442 is an apocalyptic number.

43131330442 is a deficient number, since it is larger than the sum of its proper divisors (21565665224).

43131330442 is a wasteful number, since it uses less digits than its factorization.

43131330442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21565665223.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 43131330442 its reverse (24403313134), we get a palindrome (67534643576).

The spelling of 43131330442 in words is "forty-three billion, one hundred thirty-one million, three hundred thirty thousand, four hundred forty-two".