205450557 has 16 divisors (see below), whose sum is σ = 295438080. Its totient is φ = 126245952.

The previous prime is 205450519. The next prime is 205450573. The reversal of 205450557 is 755054502.

It is not a de Polignac number, because 205450557 - 2⁷ = 205450429 is a prime.

It is a super-2 number, since 2×205450557² = 84419862743220498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205450577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26044 + ... + 33002.

It is an arithmetic number, because the mean of its divisors is an integer number (18464880).

Almost surely, 2^205450557 is an apocalyptic number.

It is an amenable number.

205450557 is a deficient number, since it is larger than the sum of its proper divisors (89987523).

205450557 is a wasteful number, since it uses less digits than its factorization.

205450557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7732.

The product of its (nonzero) digits is 35000, while the sum is 33.

The square root of 205450557 is about 14333.5465604295. The cubic root of 205450557 is about 590.0685135412.

The spelling of 205450557 in words is "two hundred five million, four hundred fifty thousand, five hundred fifty-seven".