205562057 has 4 divisors (see below), whose sum is σ = 205722576. Its totient is φ = 205401540.

The previous prime is 205562051. The next prime is 205562089. The reversal of 205562057 is 750265502.

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.

It is a cyclic number.

It is not a de Polignac number, because 205562057 - 2⁴ = 205562041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205562051) 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, 78323 + ... + 80904.

It is an arithmetic number, because the mean of its divisors is an integer number (51430644).

Almost surely, 2^205562057 is an apocalyptic number.

It is an amenable number.

205562057 is a deficient number, since it is larger than the sum of its proper divisors (160519).

205562057 is a wasteful number, since it uses less digits than its factorization.

205562057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160518.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 205562057 is about 14337.4355098811. The cubic root of 205562057 is about 590.1752395288.

The spelling of 205562057 in words is "two hundred five million, five hundred sixty-two thousand, fifty-seven".