231130555 has 16 divisors (see below), whose sum is σ = 294088320. Its totient is φ = 173780992.

The previous prime is 231130541. The next prime is 231130561. The reversal of 231130555 is 555031132.

It is a cyclic number.

It is not a de Polignac number, because 231130555 - 2¹⁹ = 230606267 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 77502 + ... + 80428.

It is an arithmetic number, because the mean of its divisors is an integer number (18380520).

Almost surely, 2^231130555 is an apocalyptic number.

231130555 is a deficient number, since it is larger than the sum of its proper divisors (62957765).

231130555 is a wasteful number, since it uses less digits than its factorization.

231130555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 231130555 is about 15202.9784910721. The cubic root of 231130555 is about 613.6948150365.

Adding to 231130555 its reverse (555031132), we get a palindrome (786161687).

The spelling of 231130555 in words is "two hundred thirty-one million, one hundred thirty thousand, five hundred fifty-five".