234821231 has 4 divisors (see below), whose sum is σ = 235651272. Its totient is φ = 233991192.

The previous prime is 234821183. The next prime is 234821233. The reversal of 234821231 is 132128432.

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

It is not a de Polignac number, because 234821231 - 2¹⁰ = 234820207 is a prime.

It is a super-2 number, since 2×234821231² = 110282021056710722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 234821231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234821233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414596 + ... + 415161.

It is an arithmetic number, because the mean of its divisors is an integer number (58912818).

Almost surely, 2^234821231 is an apocalyptic number.

234821231 is a deficient number, since it is larger than the sum of its proper divisors (830041).

234821231 is an equidigital number, since it uses as much as digits as its factorization.

234821231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830040.

The product of its digits is 2304, while the sum is 26.

The square root of 234821231 is about 15323.8778055687. The cubic root of 234821231 is about 616.9440595059.

Adding to 234821231 its reverse (132128432), we get a palindrome (366949663).

The spelling of 234821231 in words is "two hundred thirty-four million, eight hundred twenty-one thousand, two hundred thirty-one".