205461057 has 8 divisors (see below), whose sum is σ = 274228480. Its totient is φ = 136833840.

The previous prime is 205461029. The next prime is 205461071. The reversal of 205461057 is 750164502.

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

It is not a de Polignac number, because 205461057 - 2²⁷ = 71243329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205461757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31582 + ... + 37527.

It is an arithmetic number, because the mean of its divisors is an integer number (34278560).

Almost surely, 2^205461057 is an apocalyptic number.

It is an amenable number.

205461057 is a deficient number, since it is larger than the sum of its proper divisors (68767423).

205461057 is an equidigital number, since it uses as much as digits as its factorization.

205461057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70103.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 205461057 is about 14333.9128293708. The cubic root of 205461057 is about 590.0785656172.

The spelling of 205461057 in words is "two hundred five million, four hundred sixty-one thousand, fifty-seven".