231111361 has 16 divisors (see below), whose sum is σ = 261080064. Its totient is φ = 203131584.

The previous prime is 231111347. The next prime is 231111409. The reversal of 231111361 is 163111132.

It is a cyclic number.

It is not a de Polignac number, because 231111361 - 2⁷ = 231111233 is a prime.

It is a super-2 number, since 2×231111361² = 106824922366544642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231111161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17496 + ... + 27718.

It is an arithmetic number, because the mean of its divisors is an integer number (16317504).

Almost surely, 2^231111361 is an apocalyptic number.

It is an amenable number.

231111361 is a deficient number, since it is larger than the sum of its proper divisors (29968703).

231111361 is a wasteful number, since it uses less digits than its factorization.

231111361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10320.

The product of its digits is 108, while the sum is 19.

The square root of 231111361 is about 15202.3472200841. The cubic root of 231111361 is about 613.6778266806.

Adding to 231111361 its reverse (163111132), we get a palindrome (394222493).

The spelling of 231111361 in words is "two hundred thirty-one million, one hundred eleven thousand, three hundred sixty-one".