234522821 has 12 divisors (see below), whose sum is σ = 254483460. Its totient is φ = 216028800.

The previous prime is 234522811. The next prime is 234522851. The reversal of 234522821 is 128225432.

It can be written as a sum of positive squares in 6 ways, for example, as 96100 + 234426721 = 310^2 + 15311^2 .

It is not a de Polignac number, because 234522821 - 2¹⁰ = 234521797 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234522811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100415 + ... + 102723.

It is an arithmetic number, because the mean of its divisors is an integer number (21206955).

Almost surely, 2^234522821 is an apocalyptic number.

It is an amenable number.

234522821 is a deficient number, since it is larger than the sum of its proper divisors (19960639).

234522821 is a wasteful number, since it uses less digits than its factorization.

234522821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936 (or 2923 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 234522821 is about 15314.1379450493. The cubic root of 234522821 is about 616.6826119406.

The spelling of 234522821 in words is "two hundred thirty-four million, five hundred twenty-two thousand, eight hundred twenty-one".