205431004 has 6 divisors (see below), whose sum is σ = 359504264. Its totient is φ = 102715500.

The previous prime is 205431001. The next prime is 205431007. The reversal of 205431004 is 400134502.

205431004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (205431001) and next prime (205431007).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205431001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25678872 + ... + 25678879.

Almost surely, 2^205431004 is an apocalyptic number.

It is an amenable number.

205431004 is a deficient number, since it is larger than the sum of its proper divisors (154073260).

205431004 is a wasteful number, since it uses less digits than its factorization.

205431004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51357755 (or 51357753 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 205431004 is about 14332.8644729517. The cubic root of 205431004 is about 590.0497937483.

Adding to 205431004 its reverse (400134502), we get a palindrome (605565506).

The spelling of 205431004 in words is "two hundred five million, four hundred thirty-one thousand, four".