205126465 has 4 divisors (see below), whose sum is σ = 246151764. Its totient is φ = 164101168.

The previous prime is 205126459. The next prime is 205126477. The reversal of 205126465 is 564621502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564621502 = 2 ⋅282310751.

It can be written as a sum of positive squares in 2 ways, for example, as 155550784 + 49575681 = 12472^2 + 7041^2 .

It is a cyclic number.

It is not a de Polignac number, because 205126465 - 2¹³ = 205118273 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20512642 + ... + 20512651.

It is an arithmetic number, because the mean of its divisors is an integer number (61537941).

Almost surely, 2^205126465 is an apocalyptic number.

It is an amenable number.

205126465 is a deficient number, since it is larger than the sum of its proper divisors (41025299).

205126465 is an equidigital number, since it uses as much as digits as its factorization.

205126465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41025298.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 205126465 is about 14322.2367317399. The cubic root of 205126465 is about 589.7580785437.

Adding to 205126465 its reverse (564621502), we get a palindrome (769747967).

The spelling of 205126465 in words is "two hundred five million, one hundred twenty-six thousand, four hundred sixty-five".