205251343 has 4 divisors (see below), whose sum is σ = 223910568. Its totient is φ = 186592120.

The previous prime is 205251329. The next prime is 205251367. The reversal of 205251343 is 343152502.

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

It is not a de Polignac number, because 205251343 - 2⁹ = 205250831 is a prime.

It is a super-2 number, since 2×205251343² = 84256227606607298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205251313) 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, 9329596 + ... + 9329617.

It is an arithmetic number, because the mean of its divisors is an integer number (55977642).

Almost surely, 2^205251343 is an apocalyptic number.

205251343 is a deficient number, since it is larger than the sum of its proper divisors (18659225).

205251343 is a wasteful number, since it uses less digits than its factorization.

205251343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18659224.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 205251343 is about 14326.5956528409. The cubic root of 205251343 is about 589.8777329711.

The spelling of 205251343 in words is "two hundred five million, two hundred fifty-one thousand, three hundred forty-three".