205541135 has 24 divisors (see below), whose sum is σ = 264746976. Its totient is φ = 153146880.

The previous prime is 205541131. The next prime is 205541143. The reversal of 205541135 is 531145502.

It is not a de Polignac number, because 205541135 - 2² = 205541131 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 (205541131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148145 + ... + 149525.

It is an arithmetic number, because the mean of its divisors is an integer number (11031124).

Almost surely, 2^205541135 is an apocalyptic number.

205541135 is a deficient number, since it is larger than the sum of its proper divisors (59205841).

205541135 is a wasteful number, since it uses less digits than its factorization.

205541135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523 (or 1506 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 205541135 is about 14336.7058629240. The cubic root of 205541135 is about 590.1552162724.

Adding to 205541135 its reverse (531145502), we get a palindrome (736686637).

The spelling of 205541135 in words is "two hundred five million, five hundred forty-one thousand, one hundred thirty-five".