205223636152123 has 4 divisors (see below), whose sum is σ = 205238931957160. Its totient is φ = 205208340347088.

The previous prime is 205223636152121. The next prime is 205223636152163. The reversal of 205223636152123 is 321251636322502.

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 205223636152123 - 2¹ = 205223636152121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205223636152123.

It is not an unprimeable number, because it can be changed into a prime (205223636152121) 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, 7647882393 + ... + 7647909226.

It is an arithmetic number, because the mean of its divisors is an integer number (51309732989290).

Almost surely, 2^{205223636152123} is an apocalyptic number.

205223636152123 is a deficient number, since it is larger than the sum of its proper divisors (15295805037).

205223636152123 is a wasteful number, since it uses less digits than its factorization.

205223636152123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15295805036.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 205223636152123 in words is "two hundred five trillion, two hundred twenty-three billion, six hundred thirty-six million, one hundred fifty-two thousand, one hundred twenty-three".