205601057 has 4 divisors (see below), whose sum is σ = 206143920. Its totient is φ = 205058196.

The previous prime is 205601047. The next prime is 205601093. The reversal of 205601057 is 750106502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 750106502 = 2 ⋅375053251.

It is a cyclic number.

It is not a de Polignac number, because 205601057 - 2⁴ = 205601041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205601027) 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, 270863 + ... + 271620.

It is an arithmetic number, because the mean of its divisors is an integer number (51535980).

Almost surely, 2^205601057 is an apocalyptic number.

It is an amenable number.

205601057 is a deficient number, since it is larger than the sum of its proper divisors (542863).

205601057 is an equidigital number, since it uses as much as digits as its factorization.

205601057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542862.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 205601057 is about 14338.7955212424. The cubic root of 205601057 is about 590.2125605844.

Adding to 205601057 its reverse (750106502), we get a palindrome (955707559).

Subtracting 205601057 from its reverse (750106502), we obtain a palindrome (544505445).

The spelling of 205601057 in words is "two hundred five million, six hundred one thousand, fifty-seven".