231120305 has 8 divisors (see below), whose sum is σ = 298678632. Its totient is φ = 170673408.

The previous prime is 231120293. The next prime is 231120341. The reversal of 231120305 is 503021132.

It can be written as a sum of positive squares in 4 ways, for example, as 48762289 + 182358016 = 6983^2 + 13504^2 .

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 231120305 - 2¹⁸ = 230858161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1777784 + ... + 1777913.

It is an arithmetic number, because the mean of its divisors is an integer number (37334829).

Almost surely, 2^231120305 is an apocalyptic number.

It is an amenable number.

231120305 is a deficient number, since it is larger than the sum of its proper divisors (67558327).

231120305 is a wasteful number, since it uses less digits than its factorization.

231120305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555715.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 231120305 is about 15202.6413823388. The cubic root of 231120305 is about 613.6857430139.

Adding to 231120305 its reverse (503021132), we get a palindrome (734141437).

The spelling of 231120305 in words is "two hundred thirty-one million, one hundred twenty thousand, three hundred five".