205231424 has 14 divisors (see below), whose sum is σ = 407256234. Its totient is φ = 102615680.

The previous prime is 205231387. The next prime is 205231427. The reversal of 205231424 is 424132502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 123654400 + 81577024 = 11120^2 + 9032^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 205231424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205231427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1603307 + ... + 1603434.

It is an arithmetic number, because the mean of its divisors is an integer number (29089731).

Almost surely, 2^205231424 is an apocalyptic number.

It is an amenable number.

205231424 is a deficient number, since it is larger than the sum of its proper divisors (202024810).

205231424 is an equidigital number, since it uses as much as digits as its factorization.

205231424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206753 (or 3206743 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 205231424 is about 14325.9004603550. The cubic root of 205231424 is about 589.8586504249.

Adding to 205231424 its reverse (424132502), we get a palindrome (629363926).

The spelling of 205231424 in words is "two hundred five million, two hundred thirty-one thousand, four hundred twenty-four".