205451359 has 4 divisors (see below), whose sum is σ = 205762840. Its totient is φ = 205139880.

The previous prime is 205451357. The next prime is 205451383. The reversal of 205451359 is 953154502.

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 205451359 - 2¹ = 205451357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205451357) by changing a digit.

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, 154749 + ... + 156070.

It is an arithmetic number, because the mean of its divisors is an integer number (51440710).

Almost surely, 2^205451359 is an apocalyptic number.

205451359 is a deficient number, since it is larger than the sum of its proper divisors (311481).

205451359 is an equidigital number, since it uses as much as digits as its factorization.

205451359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311480.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 205451359 is about 14333.5745367302. The cubic root of 205451359 is about 590.0692813405.

It can be divided in two parts, 20545 and 1359, that added together give a square (21904 = 148²).

The spelling of 205451359 in words is "two hundred five million, four hundred fifty-one thousand, three hundred fifty-nine".