231116251 has 8 divisors (see below), whose sum is σ = 236762624. Its totient is φ = 225529920.

The previous prime is 231116231. The next prime is 231116257. The reversal of 231116251 is 152611132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231116251 - 2¹⁵ = 231083483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231116257) 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 7 ways as a sum of consecutive naturals, for example, 7170 + ... + 22663.

It is an arithmetic number, because the mean of its divisors is an integer number (29595328).

Almost surely, 2^231116251 is an apocalyptic number.

231116251 is a deficient number, since it is larger than the sum of its proper divisors (5646373).

231116251 is a wasteful number, since it uses less digits than its factorization.

231116251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30021.

The product of its digits is 360, while the sum is 22.

The square root of 231116251 is about 15202.5080496608. The cubic root of 231116251 is about 613.6821548443.

Adding to 231116251 its reverse (152611132), we get a palindrome (383727383).

The spelling of 231116251 in words is "two hundred thirty-one million, one hundred sixteen thousand, two hundred fifty-one".