43311031109 has 2 divisors, whose sum is σ = 43311031110. Its totient is φ = 43311031108.

The previous prime is 43311031091. The next prime is 43311031123. The reversal of 43311031109 is 90113011334.

Together with previous prime (43311031091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30449203009 + 12861828100 = 174497^2 + 113410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43311031109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43311030109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21655515554 + 21655515555.

It is an arithmetic number, because the mean of its divisors is an integer number (21655515555).

Almost surely, 2^43311031109 is an apocalyptic number.

It is an amenable number.

43311031109 is a deficient number, since it is larger than the sum of its proper divisors (1).

43311031109 is an equidigital number, since it uses as much as digits as its factorization.

43311031109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 43311031109 in words is "forty-three billion, three hundred eleven million, thirty-one thousand, one hundred nine".