205424114257 has 4 divisors (see below), whose sum is σ = 206488488100. Its totient is φ = 204359740416.

The previous prime is 205424114251. The next prime is 205424114303. The reversal of 205424114257 is 752411424502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752411424502 = 2 ⋅376205712251.

It can be written as a sum of positive squares in 2 ways, for example, as 81272887056 + 124151227201 = 285084^2 + 352351^2 .

It is a cyclic number.

It is not a de Polignac number, because 205424114257 - 2²⁷ = 205289896529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205424114251) 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, 532186632 + ... + 532187017.

It is an arithmetic number, because the mean of its divisors is an integer number (51622122025).

Almost surely, 2^205424114257 is an apocalyptic number.

It is an amenable number.

205424114257 is a deficient number, since it is larger than the sum of its proper divisors (1064373843).

205424114257 is a wasteful number, since it uses less digits than its factorization.

205424114257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064373842.

The product of its (nonzero) digits is 89600, while the sum is 37.

Adding to 205424114257 its reverse (752411424502), we get a palindrome (957835538759).

The spelling of 205424114257 in words is "two hundred five billion, four hundred twenty-four million, one hundred fourteen thousand, two hundred fifty-seven".