31233530145005 has 4 divisors (see below), whose sum is σ = 37480236174012. Its totient is φ = 24986824116000.

The previous prime is 31233530144987. The next prime is 31233530145007. The reversal of 31233530145005 is 50054103533213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6400510385929 + 24833019759076 = 2529923^2 + 4983274^2 .

It is not a de Polignac number, because 31233530145005 - 2¹⁶ = 31233530079469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31233530145007) 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 in 3 ways as a sum of consecutive naturals, for example, 3123353014496 + ... + 3123353014505.

It is an arithmetic number, because the mean of its divisors is an integer number (9370059043503).

Almost surely, 2^{31233530145005} is an apocalyptic number.

It is an amenable number.

31233530145005 is a deficient number, since it is larger than the sum of its proper divisors (6246706029007).

31233530145005 is an equidigital number, since it uses as much as digits as its factorization.

31233530145005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6246706029006.

The product of its (nonzero) digits is 81000, while the sum is 35.

Adding to 31233530145005 its reverse (50054103533213), we get a palindrome (81287633678218).

The spelling of 31233530145005 in words is "thirty-one trillion, two hundred thirty-three billion, five hundred thirty million, one hundred forty-five thousand, five".