231128255 has 8 divisors (see below), whose sum is σ = 291951600. Its totient is φ = 175170816.

The previous prime is 231128237. The next prime is 231128263. The reversal of 231128255 is 552821132.

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 231128255 - 2¹⁴ = 231111871 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216370 + ... + 1216559.

It is an arithmetic number, because the mean of its divisors is an integer number (36493950).

Almost surely, 2^231128255 is an apocalyptic number.

231128255 is a deficient number, since it is larger than the sum of its proper divisors (60823345).

231128255 is a wasteful number, since it uses less digits than its factorization.

231128255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432953.

The product of its digits is 4800, while the sum is 29.

The square root of 231128255 is about 15202.9028478117. The cubic root of 231128255 is about 613.6927793865.

Adding to 231128255 its reverse (552821132), we get a palindrome (783949387).

The spelling of 231128255 in words is "two hundred thirty-one million, one hundred twenty-eight thousand, two hundred fifty-five".