205121652 has 24 divisors (see below), whose sum is σ = 479910816. Its totient is φ = 68189088.

The previous prime is 205121641. The next prime is 205121681. The reversal of 205121652 is 256121502.

It is a happy number.

205121652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 18438 + ... + 27389.

It is an arithmetic number, because the mean of its divisors is an integer number (19996284).

Almost surely, 2^205121652 is an apocalyptic number.

It is an amenable number.

205121652 is an abundant number, since it is smaller than the sum of its proper divisors (274789164).

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

205121652 is a wasteful number, since it uses less digits than its factorization.

205121652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46207 (or 46205 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 205121652 is about 14322.0687053233. The cubic root of 205121652 is about 589.7534658968.

The spelling of 205121652 in words is "two hundred five million, one hundred twenty-one thousand, six hundred fifty-two".