205130465 has 4 divisors (see below), whose sum is σ = 246156564. Its totient is φ = 164104368.

The previous prime is 205130407. The next prime is 205130467. The reversal of 205130465 is 564031502.

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 151093264 + 54037201 = 12292^2 + 7351^2 .

It is a cyclic number.

It is not a de Polignac number, because 205130465 - 2²² = 200936161 is a prime.

It is a super-2 number, since 2×205130465² = 84157015342232450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205130467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20513042 + ... + 20513051.

It is an arithmetic number, because the mean of its divisors is an integer number (61539141).

Almost surely, 2^205130465 is an apocalyptic number.

It is an amenable number.

205130465 is a deficient number, since it is larger than the sum of its proper divisors (41026099).

205130465 is an equidigital number, since it uses as much as digits as its factorization.

205130465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41026098.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 205130465 is about 14322.3763740519. The cubic root of 205130465 is about 589.7619119788.

Adding to 205130465 its reverse (564031502), we get a palindrome (769161967).

The spelling of 205130465 in words is "two hundred five million, one hundred thirty thousand, four hundred sixty-five".