231134511 has 4 divisors (see below), whose sum is σ = 308179352. Its totient is φ = 154089672.

The previous prime is 231134471. The next prime is 231134531. The reversal of 231134511 is 115431132.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 231134511 - 2¹¹ = 231132463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231134531) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 38522416 + ... + 38522421.

It is an arithmetic number, because the mean of its divisors is an integer number (77044838).

Almost surely, 2^231134511 is an apocalyptic number.

231134511 is a deficient number, since it is larger than the sum of its proper divisors (77044841).

231134511 is an equidigital number, since it uses as much as digits as its factorization.

231134511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77044840.

The product of its digits is 360, while the sum is 21.

The square root of 231134511 is about 15203.1085965996. The cubic root of 231134511 is about 613.6983163229.

Adding to 231134511 its reverse (115431132), we get a palindrome (346565643).

The spelling of 231134511 in words is "two hundred thirty-one million, one hundred thirty-four thousand, five hundred eleven".