205054044253 has 4 divisors (see below), whose sum is σ = 206412018208. Its totient is φ = 203696070300.

The previous prime is 205054044193. The next prime is 205054044257. The reversal of 205054044253 is 352440450502.

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 a de Polignac number, because none of the positive numbers 2^k-205054044253 is a prime.

It is a super-2 number, since 2×205054044253² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205054044257) 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, 678986751 + ... + 678987052.

It is an arithmetic number, because the mean of its divisors is an integer number (51603004552).

Almost surely, 2^205054044253 is an apocalyptic number.

It is an amenable number.

205054044253 is a deficient number, since it is larger than the sum of its proper divisors (1357973955).

205054044253 is a wasteful number, since it uses less digits than its factorization.

205054044253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357973954.

The product of its (nonzero) digits is 96000, while the sum is 34.

Adding to 205054044253 its reverse (352440450502), we get a palindrome (557494494755).

The spelling of 205054044253 in words is "two hundred five billion, fifty-four million, forty-four thousand, two hundred fifty-three".