231123751 has 2 divisors, whose sum is σ = 231123752. Its totient is φ = 231123750.

The previous prime is 231123713. The next prime is 231123773. The reversal of 231123751 is 157321132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231123751 - 2⁷ = 231123623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231123701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115561875 + 115561876.

It is an arithmetic number, because the mean of its divisors is an integer number (115561876).

Almost surely, 2^231123751 is an apocalyptic number.

231123751 is a deficient number, since it is larger than the sum of its proper divisors (1).

231123751 is an equidigital number, since it uses as much as digits as its factorization.

231123751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 231123751 is about 15202.7547174846. The cubic root of 231123751 is about 613.6887930136.

Adding to 231123751 its reverse (157321132), we get a palindrome (388444883).

It can be divided in two parts, 2311 and 23751, that added together give a palindrome (26062).

The spelling of 231123751 in words is "two hundred thirty-one million, one hundred twenty-three thousand, seven hundred fifty-one".