205151205 has 16 divisors (see below), whose sum is σ = 375133824. Its totient is φ = 93783360.

The previous prime is 205151203. The next prime is 205151239. The reversal of 205151205 is 502151502.

It is not a de Polignac number, because 205151205 - 2¹ = 205151203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205151203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 976806 + ... + 977015.

It is an arithmetic number, because the mean of its divisors is an integer number (23445864).

Almost surely, 2^205151205 is an apocalyptic number.

It is an amenable number.

205151205 is a deficient number, since it is larger than the sum of its proper divisors (169982619).

205151205 is a wasteful number, since it uses less digits than its factorization.

205151205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953836.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 205151205 is about 14323.1003976095. The cubic root of 205151205 is about 589.7817875408.

The spelling of 205151205 in words is "two hundred five million, one hundred fifty-one thousand, two hundred five".