43556222031131 has 2 divisors, whose sum is σ = 43556222031132. Its totient is φ = 43556222031130.

The previous prime is 43556222031097. The next prime is 43556222031173. The reversal of 43556222031131 is 13113022265534.

43556222031131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43556222031131 is a prime.

It is a super-2 number, since 2×43556222031131² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (43556222031731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21778111015565 + 21778111015566.

It is an arithmetic number, because the mean of its divisors is an integer number (21778111015566).

Almost surely, 2^{43556222031131} is an apocalyptic number.

43556222031131 is a deficient number, since it is larger than the sum of its proper divisors (1).

43556222031131 is an equidigital number, since it uses as much as digits as its factorization.

43556222031131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 43556222031131 its reverse (13113022265534), we get a palindrome (56669244296665).

The spelling of 43556222031131 in words is "forty-three trillion, five hundred fifty-six billion, two hundred twenty-two million, thirty-one thousand, one hundred thirty-one".