205351 has 4 divisors (see below), whose sum is σ = 206712. Its totient is φ = 203992.

The previous prime is 205339. The next prime is 205357. The reversal of 205351 is 153502.

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

It is a cyclic number.

It is not a de Polignac number, because 205351 - 2⁵ = 205319 is a prime.

It is a super-4 number, since 4×205351⁴ (a number of 22 digits) contains 4444 as substring.

It is a Duffinian number.

205351 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205357) 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, 421 + ... + 766.

It is an arithmetic number, because the mean of its divisors is an integer number (51678).

2²⁰⁵³⁵¹ is an apocalyptic number.

205351 is a deficient number, since it is larger than the sum of its proper divisors (1361).

205351 is a wasteful number, since it uses less digits than its factorization.

205351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 205351 is about 453.1567057873. The cubic root of 205351 is about 58.9973186563.

Adding to 205351 its reverse (153502), we get a palindrome (358853).

The spelling of 205351 in words is "two hundred five thousand, three hundred fifty-one".