231515004004320 has 192 divisors, whose sum is σ = 743991953160960. Its totient is φ = 60500771831808.

The previous prime is 231515004004289. The next prime is 231515004004327. The reversal of 231515004004320 is 23400400515132.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231515004004327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12442990 + ... + 24856749.

It is an arithmetic number, because the mean of its divisors is an integer number (3874958089380).

Almost surely, 2^{231515004004320} is an apocalyptic number.

231515004004320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231515004004320 is an abundant number, since it is smaller than the sum of its proper divisors (512476949156640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231515004004320 is a wasteful number, since it uses less digits than its factorization.

231515004004320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37300017 (or 37300009 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 231515004004320 its reverse (23400400515132), we get a palindrome (254915404519452).

The spelling of 231515004004320 in words is "two hundred thirty-one trillion, five hundred fifteen billion, four million, four thousand, three hundred twenty".