231515520353213 has 8 divisors (see below), whose sum is σ = 235513187741856. Its totient is φ = 227524379770800.

The previous prime is 231515520353191. The next prime is 231515520353251. The reversal of 231515520353213 is 312353025515132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231515520353213 - 2²⁸ = 231515251917757 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 (231515520352213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1631630003 + ... + 1631771888.

It is an arithmetic number, because the mean of its divisors is an integer number (29439148467732).

Almost surely, 2^{231515520353213} is an apocalyptic number.

It is an amenable number.

231515520353213 is a deficient number, since it is larger than the sum of its proper divisors (3997667388643).

231515520353213 is a wasteful number, since it uses less digits than its factorization.

231515520353213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263403115.

The product of its (nonzero) digits is 405000, while the sum is 41.

Adding to 231515520353213 its reverse (312353025515132), we get a palindrome (543868545868345).

The spelling of 231515520353213 in words is "two hundred thirty-one trillion, five hundred fifteen billion, five hundred twenty million, three hundred fifty-three thousand, two hundred thirteen".