205153061 has 4 divisors (see below), whose sum is σ = 205184652. Its totient is φ = 205121472.

The previous prime is 205153037. The next prime is 205153097. The reversal of 205153061 is 160351502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9572836 + 195580225 = 3094^2 + 13985^2 .

It is a cyclic number.

It is not a de Polignac number, because 205153061 - 2²⁶ = 138044197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205153021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090 + ... + 20363.

It is an arithmetic number, because the mean of its divisors is an integer number (51296163).

Almost surely, 2^205153061 is an apocalyptic number.

It is an amenable number.

205153061 is a deficient number, since it is larger than the sum of its proper divisors (31591).

205153061 is an equidigital number, since it uses as much as digits as its factorization.

205153061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31590.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 205153061 is about 14323.1651879045. The cubic root of 205153061 is about 589.7835661179.

The spelling of 205153061 in words is "two hundred five million, one hundred fifty-three thousand, sixty-one".