205420235 has 4 divisors (see below), whose sum is σ = 246504288. Its totient is φ = 164336184.

The previous prime is 205420223. The next prime is 205420247. The reversal of 205420235 is 532024502.

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

It is an interprime number because it is at equal distance from previous prime (205420223) and next prime (205420247).

It is a cyclic number.

It is not a de Polignac number, because 205420235 - 2⁸ = 205419979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205420235.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20542019 + ... + 20542028.

It is an arithmetic number, because the mean of its divisors is an integer number (61626072).

Almost surely, 2^205420235 is an apocalyptic number.

205420235 is a deficient number, since it is larger than the sum of its proper divisors (41084053).

205420235 is an equidigital number, since it uses as much as digits as its factorization.

205420235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41084052.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 205420235 is about 14332.4887929487. The cubic root of 205420235 is about 590.0394831377.

Adding to 205420235 its reverse (532024502), we get a palindrome (737444737).

The spelling of 205420235 in words is "two hundred five million, four hundred twenty thousand, two hundred thirty-five".