205352223251 has 24 divisors (see below), whose sum is σ = 245193135264. Its totient is φ = 171380872320.

The previous prime is 205352223247. The next prime is 205352223287. The reversal of 205352223251 is 152322253502.

It is not a de Polignac number, because 205352223251 - 2² = 205352223247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205352223221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 908921 + ... + 1112133.

It is an arithmetic number, because the mean of its divisors is an integer number (10216380636).

Almost surely, 2^205352223251 is an apocalyptic number.

205352223251 is a deficient number, since it is larger than the sum of its proper divisors (39840912013).

205352223251 is a wasteful number, since it uses less digits than its factorization.

205352223251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203771 (or 203764 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 205352223251 its reverse (152322253502), we get a palindrome (357674476753).

The spelling of 205352223251 in words is "two hundred five billion, three hundred fifty-two million, two hundred twenty-three thousand, two hundred fifty-one".