231325311 has 8 divisors (see below), whose sum is σ = 352495744. Its totient is φ = 132185880.

The previous prime is 231325279. The next prime is 231325319. The reversal of 231325311 is 113523132.

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

It is not a de Polignac number, because 231325311 - 2⁵ = 231325279 is a prime.

It is a super-3 number, since 3×231325311³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 11015491 = 231325311 / (2 + 3 + 1 + 3 + 2 + 5 + 3 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231325319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5507725 + ... + 5507766.

It is an arithmetic number, because the mean of its divisors is an integer number (44061968).

Almost surely, 2^231325311 is an apocalyptic number.

231325311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231325311 is a deficient number, since it is larger than the sum of its proper divisors (121170433).

231325311 is a wasteful number, since it uses less digits than its factorization.

231325311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11015501.

The product of its digits is 540, while the sum is 21.

The square root of 231325311 is about 15209.3823345986. The cubic root of 231325311 is about 613.8671378359.

Adding to 231325311 its reverse (113523132), we get a palindrome (344848443).

The spelling of 231325311 in words is "two hundred thirty-one million, three hundred twenty-five thousand, three hundred eleven".