234431231 has 4 divisors (see below), whose sum is σ = 234462552. Its totient is φ = 234399912.

The previous prime is 234431221. The next prime is 234431237. The reversal of 234431231 is 132134432.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 234431231 - 2⁶ = 234431167 is a prime.

It is a super-2 number, since 2×234431231² = 109916004136350722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 234431197 and 234431206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234431237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2900 + ... + 21846.

It is an arithmetic number, because the mean of its divisors is an integer number (58615638).

Almost surely, 2^234431231 is an apocalyptic number.

234431231 is a deficient number, since it is larger than the sum of its proper divisors (31321).

234431231 is a wasteful number, since it uses less digits than its factorization.

234431231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31320.

The product of its digits is 1728, while the sum is 23.

The square root of 234431231 is about 15311.1472790252. The cubic root of 234431231 is about 616.6023222207.

Adding to 234431231 its reverse (132134432), we get a palindrome (366565663).

The spelling of 234431231 in words is "two hundred thirty-four million, four hundred thirty-one thousand, two hundred thirty-one".