231753505513 has 4 divisors (see below), whose sum is σ = 231869558340. Its totient is φ = 231637452688.

The previous prime is 231753505493. The next prime is 231753505519. The reversal of 231753505513 is 315505357132.

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 53544571609 + 178208933904 = 231397^2 + 422148^2 .

It is a cyclic number.

It is not a de Polignac number, because 231753505513 - 2¹⁷ = 231753374441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231753505519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58023418 + ... + 58027411.

It is an arithmetic number, because the mean of its divisors is an integer number (57967389585).

Almost surely, 2^231753505513 is an apocalyptic number.

It is an amenable number.

231753505513 is a deficient number, since it is larger than the sum of its proper divisors (116052827).

231753505513 is a wasteful number, since it uses less digits than its factorization.

231753505513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116052826.

The product of its (nonzero) digits is 236250, while the sum is 40.

The spelling of 231753505513 in words is "two hundred thirty-one billion, seven hundred fifty-three million, five hundred five thousand, five hundred thirteen".