231617925289 has 9 divisors (see below), whose sum is σ = 233740662103. Its totient is φ = 229514307232.

The previous prime is 231617925283. The next prime is 231617925293. The reversal of 231617925289 is 982529716132.

The square root of 231617925289 is 481267.

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., 4081293225 + 227536632064 = 63885^2 + 477008^2 .

It is not a de Polignac number, because 231617925289 - 2²⁷ = 231483707561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231617925283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 54381042 + ... + 54385300.

Almost surely, 2^231617925289 is an apocalyptic number.

231617925289 is the 481267-th square number.

231617925289 is the 240634-th centered octagonal number.

It is an amenable number.

231617925289 is a deficient number, since it is larger than the sum of its proper divisors (2122736814).

231617925289 is an frugal number, since it uses more digits than its factorization.

231617925289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8744 (or 4372 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 55.

The spelling of 231617925289 in words is "two hundred thirty-one billion, six hundred seventeen million, nine hundred twenty-five thousand, two hundred eighty-nine".