231043011 has 4 divisors (see below), whose sum is σ = 308057352. Its totient is φ = 154028672.

The previous prime is 231043003. The next prime is 231043037. The reversal of 231043011 is 110340132.

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

It is a cyclic number.

It is not a de Polignac number, because 231043011 - 2³ = 231043003 is a prime.

It is a super-2 number, since 2×231043011² = 106761745863892242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231043411) 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, 38507166 + ... + 38507171.

It is an arithmetic number, because the mean of its divisors is an integer number (77014338).

Almost surely, 2^231043011 is an apocalyptic number.

231043011 is a deficient number, since it is larger than the sum of its proper divisors (77014341).

231043011 is an equidigital number, since it uses as much as digits as its factorization.

231043011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77014340.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231043011 is about 15200.0990457299. The cubic root of 231043011 is about 613.6173233588.

Adding to 231043011 its reverse (110340132), we get a palindrome (341383143).

The spelling of 231043011 in words is "two hundred thirty-one million, forty-three thousand, eleven".