204255105251 has 4 divisors (see below), whose sum is σ = 204256289472. Its totient is φ = 204253921032.

The previous prime is 204255105221. The next prime is 204255105259. The reversal of 204255105251 is 152501552402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 204255105251 - 2¹⁴ = 204255088867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204255105259) 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, 277760 + ... + 696893.

It is an arithmetic number, because the mean of its divisors is an integer number (51064072368).

Almost surely, 2^204255105251 is an apocalyptic number.

204255105251 is a deficient number, since it is larger than the sum of its proper divisors (1184221).

204255105251 is an equidigital number, since it uses as much as digits as its factorization.

204255105251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184220.

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 204255105251 its reverse (152501552402), we get a palindrome (356756657653).

The spelling of 204255105251 in words is "two hundred four billion, two hundred fifty-five million, one hundred five thousand, two hundred fifty-one".