205034513 has 4 divisors (see below), whose sum is σ = 205463040. Its totient is φ = 204605988.

The previous prime is 205034477. The next prime is 205034521. The reversal of 205034513 is 315430502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315430502 = 2 ⋅157715251.

It is a cyclic number.

It is not a de Polignac number, because 205034513 - 2¹⁴ = 205018129 is a prime.

It is a super-2 number, since 2×205034513² = 84078303042294338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205034573) 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, 213545 + ... + 214502.

It is an arithmetic number, because the mean of its divisors is an integer number (51365760).

Almost surely, 2^205034513 is an apocalyptic number.

It is an amenable number.

205034513 is a deficient number, since it is larger than the sum of its proper divisors (428527).

205034513 is an equidigital number, since it uses as much as digits as its factorization.

205034513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428526.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 205034513 is about 14319.0262587929. The cubic root of 205034513 is about 589.6699417935.

It can be divided in two parts, 2050 and 34513, that added together give a palindrome (36563).

The spelling of 205034513 in words is "two hundred five million, thirty-four thousand, five hundred thirteen".