205542461 has 8 divisors (see below), whose sum is σ = 217808640. Its totient is φ = 193295808.

The previous prime is 205542413. The next prime is 205542473. The reversal of 205542461 is 164245502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205542461 - 2⁶ = 205542397 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 (205542481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20660 + ... + 28946.

It is an arithmetic number, because the mean of its divisors is an integer number (27226080).

Almost surely, 2^205542461 is an apocalyptic number.

It is an amenable number.

205542461 is a deficient number, since it is larger than the sum of its proper divisors (12266179).

205542461 is a wasteful number, since it uses less digits than its factorization.

205542461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9763.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 205542461 is about 14336.7521077823. The cubic root of 205542461 is about 590.1564853519.

Adding to 205542461 its reverse (164245502), we get a palindrome (369787963).

The spelling of 205542461 in words is "two hundred five million, five hundred forty-two thousand, four hundred sixty-one".