231711230 has 16 divisors (see below), whose sum is σ = 424950624. Its totient is φ = 90935520.

The previous prime is 231711211. The next prime is 231711239. The reversal of 231711230 is 32117132.

It is a super-2 number, since 2×231711230² = 107380188216225800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231711239) by changing a digit.

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, 218066 + ... + 219125.

It is an arithmetic number, because the mean of its divisors is an integer number (26559414).

Almost surely, 2^231711230 is an apocalyptic number.

231711230 is a deficient number, since it is larger than the sum of its proper divisors (193239394).

231711230 is a wasteful number, since it uses less digits than its factorization.

231711230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437251.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 231711230 is about 15222.0639205070. The cubic root of 231711230 is about 614.2083187922.

Adding to 231711230 its reverse (32117132), we get a palindrome (263828362).

The spelling of 231711230 in words is "two hundred thirty-one million, seven hundred eleven thousand, two hundred thirty".