205012511252 has 24 divisors (see below), whose sum is σ = 359500552992. Its totient is φ = 102298162400.

The previous prime is 205012511233. The next prime is 205012511261. The reversal of 205012511252 is 252115210502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11298227 + ... + 11316357.

It is an arithmetic number, because the mean of its divisors is an integer number (14979189708).

Almost surely, 2^205012511252 is an apocalyptic number.

It is an amenable number.

205012511252 is a deficient number, since it is larger than the sum of its proper divisors (154488041740).

205012511252 is a wasteful number, since it uses less digits than its factorization.

205012511252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23719 (or 23717 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 205012511252 its reverse (252115210502), we get a palindrome (457127721754).

The spelling of 205012511252 in words is "two hundred five billion, twelve million, five hundred eleven thousand, two hundred fifty-two".