231818175625 has 15 divisors (see below), whose sum is σ = 289695034321. Its totient is φ = 185444911000.

The previous prime is 231818175619. The next prime is 231818175629. The reversal of 231818175625 is 526571818132.

The square root of 231818175625 is 481475.

It is a perfect power (a square), and thus also a powerful number.

231818175625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 18174544969 + 213643630656 = 134813^2 + 462216^2 .

It is not a de Polignac number, because 231818175625 - 2¹¹ = 231818173577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231818175629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 12027246 + ... + 12046504.

Almost surely, 2^231818175625 is an apocalyptic number.

231818175625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

231818175625 is the 481475-th square number.

231818175625 is the 240738-th centered octagonal number.

It is an amenable number.

231818175625 is a deficient number, since it is larger than the sum of its proper divisors (57876858696).

231818175625 is an frugal number, since it uses more digits than its factorization.

231818175625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38538 (or 19264 counting only the distinct ones).

The product of its digits is 806400, while the sum is 49.

Multiplying 231818175625 by its sum of digits (49), we get a square (11359090605625 = 3370325²).

The spelling of 231818175625 in words is "two hundred thirty-one billion, eight hundred eighteen million, one hundred seventy-five thousand, six hundred twenty-five".