205242855 has 8 divisors (see below), whose sum is σ = 328388592. Its totient is φ = 109462848.

The previous prime is 205242797. The next prime is 205242899. The reversal of 205242855 is 558242502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205242855 - 2⁷ = 205242727 is a prime.

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, 6841414 + ... + 6841443.

It is an arithmetic number, because the mean of its divisors is an integer number (41048574).

Almost surely, 2^205242855 is an apocalyptic number.

205242855 is a deficient number, since it is larger than the sum of its proper divisors (123145737).

205242855 is a wasteful number, since it uses less digits than its factorization.

205242855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13682865.

The product of its (nonzero) digits is 32000, while the sum is 33.

The square root of 205242855 is about 14326.2994175049. The cubic root of 205242855 is about 589.8696015566.

The spelling of 205242855 in words is "two hundred five million, two hundred forty-two thousand, eight hundred fifty-five".