43531185349 has 2 divisors, whose sum is σ = 43531185350. Its totient is φ = 43531185348.

The previous prime is 43531185293. The next prime is 43531185391. The reversal of 43531185349 is 94358113534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37630180225 + 5901005124 = 193985^2 + 76818^2 .

It is a cyclic number.

It is not a de Polignac number, because 43531185349 - 2²³ = 43522796741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43531185299 and 43531185308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43531105349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21765592674 + 21765592675.

It is an arithmetic number, because the mean of its divisors is an integer number (21765592675).

Almost surely, 2^43531185349 is an apocalyptic number.

It is an amenable number.

43531185349 is a deficient number, since it is larger than the sum of its proper divisors (1).

43531185349 is an equidigital number, since it uses as much as digits as its factorization.

43531185349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 46.

The spelling of 43531185349 in words is "forty-three billion, five hundred thirty-one million, one hundred eighty-five thousand, three hundred forty-nine".