231753115237213 has 4 divisors (see below), whose sum is σ = 231876585199260. Its totient is φ = 231629645275168.

The previous prime is 231753115237159. The next prime is 231753115237219. The reversal of 231753115237213 is 312732511357132.

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 199289067852484 + 32464047384729 = 14116978^2 + 5697723^2 .

It is a cyclic number.

It is not a de Polignac number, because 231753115237213 - 2¹³ = 231753115229021 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 (231753115237219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61734978208 + ... + 61734981961.

It is an arithmetic number, because the mean of its divisors is an integer number (57969146299815).

Almost surely, 2^{231753115237213} is an apocalyptic number.

It is an amenable number.

231753115237213 is a deficient number, since it is larger than the sum of its proper divisors (123469962047).

231753115237213 is a wasteful number, since it uses less digits than its factorization.

231753115237213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123469962046.

The product of its digits is 793800, while the sum is 46.

The spelling of 231753115237213 in words is "two hundred thirty-one trillion, seven hundred fifty-three billion, one hundred fifteen million, two hundred thirty-seven thousand, two hundred thirteen".