205350260251 has 4 divisors (see below), whose sum is σ = 205359396904. Its totient is φ = 205341123600.

The previous prime is 205350260239. The next prime is 205350260261. The reversal of 205350260251 is 152062053502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205350260251 - 2⁷ = 205350260123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205350260201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4534530 + ... + 4579591.

It is an arithmetic number, because the mean of its divisors is an integer number (51339849226).

Almost surely, 2^205350260251 is an apocalyptic number.

205350260251 is a deficient number, since it is larger than the sum of its proper divisors (9136653).

205350260251 is an equidigital number, since it uses as much as digits as its factorization.

205350260251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9136652.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 205350260251 in words is "two hundred five billion, three hundred fifty million, two hundred sixty thousand, two hundred fifty-one".