205543340 has 12 divisors (see below), whose sum is σ = 431641056. Its totient is φ = 82217328.

The previous prime is 205543339. The next prime is 205543369. The reversal of 205543340 is 43345502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5138564 + ... + 5138603.

It is an arithmetic number, because the mean of its divisors is an integer number (35970088).

Almost surely, 2^205543340 is an apocalyptic number.

205543340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205543340 is an abundant number, since it is smaller than the sum of its proper divisors (226097716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205543340 is a wasteful number, since it uses less digits than its factorization.

205543340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10277176 (or 10277174 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 205543340 is about 14336.7827632283. The cubic root of 205543340 is about 590.1573266165.

Adding to 205543340 its reverse (43345502), we get a palindrome (248888842).

The spelling of 205543340 in words is "two hundred five million, five hundred forty-three thousand, three hundred forty".