205815841252 has 24 divisors (see below), whose sum is σ = 414773916480. Its totient is φ = 87533453280.

The previous prime is 205815841223. The next prime is 205815841337. The reversal of 205815841252 is 252148518502.

It is a junction number, because it is equal to n+sod(n) for n = 205815841199 and 205815841208.

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, 28051927 + ... + 28059262.

It is an arithmetic number, because the mean of its divisors is an integer number (17282246520).

Almost surely, 2^205815841252 is an apocalyptic number.

It is an amenable number.

205815841252 is an abundant number, since it is smaller than the sum of its proper divisors (208958075228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205815841252 is a wasteful number, since it uses less digits than its factorization.

205815841252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56111331 (or 56111329 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 43.

The spelling of 205815841252 in words is "two hundred five billion, eight hundred fifteen million, eight hundred forty-one thousand, two hundred fifty-two".