9231661873225 has 27 divisors (see below), whose sum is σ = 12582754020039. Its totient is φ = 6713814373200.

The previous prime is 9231661873211. The next prime is 9231661873309. The reversal of 9231661873225 is 5223781661329.

The square root of 9231661873225 is 3038365.

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

It can be written as a sum of positive squares in only one way, i.e., 3323398274361 + 5908263598864 = 1823019^2 + 2430692^2 .

It is not a de Polignac number, because 9231661873225 - 2¹¹ = 9231661871177 is a prime.

It is a super-2 number, since 2×9231661873225² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 167082454 + ... + 167137696.

Almost surely, 2^{9231661873225} is an apocalyptic number.

9231661873225 is the 3038365-th square number.

9231661873225 is the 1519183-rd centered octagonal number.

It is an amenable number.

9231661873225 is a deficient number, since it is larger than the sum of its proper divisors (3351092146814).

9231661873225 is an frugal number, since it uses more digits than its factorization.

9231661873225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110518 (or 55259 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 55.

The spelling of 9231661873225 in words is "nine trillion, two hundred thirty-one billion, six hundred sixty-one million, eight hundred seventy-three thousand, two hundred twenty-five".