231312515005 has 64 divisors (see below), whose sum is σ = 343957985280. Its totient is φ = 146816928000.

The previous prime is 231312515003. The next prime is 231312515011. The reversal of 231312515005 is 500515213132.

It is not a de Polignac number, because 231312515005 - 2¹ = 231312515003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231312515003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6816330 + ... + 6850180.

It is an arithmetic number, because the mean of its divisors is an integer number (5374343520).

Almost surely, 2^231312515005 is an apocalyptic number.

It is an amenable number.

231312515005 is a deficient number, since it is larger than the sum of its proper divisors (112645470275).

231312515005 is a wasteful number, since it uses less digits than its factorization.

231312515005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34402.

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 231312515005 its reverse (500515213132), we get a palindrome (731827728137).

The spelling of 231312515005 in words is "two hundred thirty-one billion, three hundred twelve million, five hundred fifteen thousand, five".