234525821 has 2 divisors, whose sum is σ = 234525822. Its totient is φ = 234525820.

The previous prime is 234525803. The next prime is 234525853. The reversal of 234525821 is 128525432.

It is an a-pointer prime, because the next prime (234525853) can be obtained adding 234525821 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234518596 + 7225 = 15314^2 + 85^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-234525821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234525521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117262910 + 117262911.

It is an arithmetic number, because the mean of its divisors is an integer number (117262911).

Almost surely, 2^234525821 is an apocalyptic number.

It is an amenable number.

234525821 is a deficient number, since it is larger than the sum of its proper divisors (1).

234525821 is an equidigital number, since it uses as much as digits as its factorization.

234525821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 32.

The square root of 234525821 is about 15314.2358934424. The cubic root of 234525821 is about 616.6852414501.

The spelling of 234525821 in words is "two hundred thirty-four million, five hundred twenty-five thousand, eight hundred twenty-one".