205542146 has 8 divisors (see below), whose sum is σ = 308856780. Its totient is φ = 102589888.

The previous prime is 205542119. The next prime is 205542149. The reversal of 205542146 is 641245502.

It can be written as a sum of positive squares in 2 ways, for example, as 201498025 + 4044121 = 14195^2 + 2011^2 .

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

It is not an unprimeable number, because it can be changed into a prime (205542149) 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, 89171 + ... + 91446.

Almost surely, 2^205542146 is an apocalyptic number.

205542146 is a deficient number, since it is larger than the sum of its proper divisors (103314634).

205542146 is a wasteful number, since it uses less digits than its factorization.

205542146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181188.

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

The square root of 205542146 is about 14336.7411220263. The cubic root of 205542146 is about 590.1561838742.

Adding to 205542146 its reverse (641245502), we get a palindrome (846787648).

The spelling of 205542146 in words is "two hundred five million, five hundred forty-two thousand, one hundred forty-six".