205423412 has 6 divisors (see below), whose sum is σ = 359490978. Its totient is φ = 102711704.

The previous prime is 205423403. The next prime is 205423433. The reversal of 205423412 is 214324502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 172291876 + 33131536 = 13126^2 + 5756^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25677923 + ... + 25677930.

It is an arithmetic number, because the mean of its divisors is an integer number (59915163).

Almost surely, 2^205423412 is an apocalyptic number.

It is an amenable number.

205423412 is a deficient number, since it is larger than the sum of its proper divisors (154067566).

205423412 is a wasteful number, since it uses less digits than its factorization.

205423412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51355857 (or 51355855 counting only the distinct ones).

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

The square root of 205423412 is about 14332.5996246320. The cubic root of 205423412 is about 590.0425249441.

Adding to 205423412 its reverse (214324502), we get a palindrome (419747914).

The spelling of 205423412 in words is "two hundred five million, four hundred twenty-three thousand, four hundred twelve".