205505331 has 8 divisors (see below), whose sum is σ = 274344144. Its totient is φ = 136835040.

The previous prime is 205505329. The next prime is 205505341. The reversal of 205505331 is 133505502.

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

It is not a de Polignac number, because 205505331 - 2¹ = 205505329 is a prime.

It is a super-2 number, since 2×205505331² = 84464882138839122, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (205505341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39256 + ... + 44181.

It is an arithmetic number, because the mean of its divisors is an integer number (34293018).

Almost surely, 2^205505331 is an apocalyptic number.

205505331 is a deficient number, since it is larger than the sum of its proper divisors (68838813).

205505331 is an equidigital number, since it uses as much as digits as its factorization.

205505331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84261.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 205505331 is about 14335.4571256029. The cubic root of 205505331 is about 590.1209471477.

The spelling of 205505331 in words is "two hundred five million, five hundred five thousand, three hundred thirty-one".