231245111 has 2 divisors, whose sum is σ = 231245112. Its totient is φ = 231245110.

The previous prime is 231245081. The next prime is 231245171. The reversal of 231245111 is 111542132.

231245111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231245111 - 2¹⁸ = 230982967 is a prime.

It is a super-2 number, since 2×231245111² = 106948602722804642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231245171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115622555 + 115622556.

It is an arithmetic number, because the mean of its divisors is an integer number (115622556).

Almost surely, 2^231245111 is an apocalyptic number.

231245111 is a deficient number, since it is larger than the sum of its proper divisors (1).

231245111 is an equidigital number, since it uses as much as digits as its factorization.

231245111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 20.

The square root of 231245111 is about 15206.7455755661. The cubic root of 231245111 is about 613.7961874862.

Adding to 231245111 its reverse (111542132), we get a palindrome (342787243).

The spelling of 231245111 in words is "two hundred thirty-one million, two hundred forty-five thousand, one hundred eleven".