31233543109 has 2 divisors, whose sum is σ = 31233543110. Its totient is φ = 31233543108.

The previous prime is 31233543071. The next prime is 31233543139. The reversal of 31233543109 is 90134533213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16958550625 + 14274992484 = 130225^2 + 119478^2 .

It is a cyclic number.

It is not a de Polignac number, because 31233543109 - 2¹⁷ = 31233412037 is a prime.

It is a super-2 number, since 2×31233543109² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31233543139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616771554 + 15616771555.

It is an arithmetic number, because the mean of its divisors is an integer number (15616771555).

Almost surely, 2^31233543109 is an apocalyptic number.

It is an amenable number.

31233543109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31233543109 is an equidigital number, since it uses as much as digits as its factorization.

31233543109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 34.

The spelling of 31233543109 in words is "thirty-one billion, two hundred thirty-three million, five hundred forty-three thousand, one hundred nine".