205513235 has 4 divisors (see below), whose sum is σ = 246615888. Its totient is φ = 164410584.

The previous prime is 205513183. The next prime is 205513237. The reversal of 205513235 is 532315502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 532315502 = 2 ⋅266157751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205513235 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205513237) 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, 20551319 + ... + 20551328.

It is an arithmetic number, because the mean of its divisors is an integer number (61653972).

Almost surely, 2^205513235 is an apocalyptic number.

205513235 is a deficient number, since it is larger than the sum of its proper divisors (41102653).

205513235 is an equidigital number, since it uses as much as digits as its factorization.

205513235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41102652.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 205513235 is about 14335.7328030345. The cubic root of 205513235 is about 590.1285126548.

Adding to 205513235 its reverse (532315502), we get a palindrome (737828737).

The spelling of 205513235 in words is "two hundred five million, five hundred thirteen thousand, two hundred thirty-five".