200123155 has 4 divisors (see below), whose sum is σ = 240147792. Its totient is φ = 160098520.

The previous prime is 200123111. The next prime is 200123191. The reversal of 200123155 is 551321002.

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

It is not a de Polignac number, because 200123155 - 2¹¹ = 200121107 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20012311 + ... + 20012320.

It is an arithmetic number, because the mean of its divisors is an integer number (60036948).

Almost surely, 2^200123155 is an apocalyptic number.

200123155 is a deficient number, since it is larger than the sum of its proper divisors (40024637).

200123155 is an equidigital number, since it uses as much as digits as its factorization.

200123155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40024636.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 200123155 is about 14146.4891404193. The cubic root of 200123155 is about 584.9235588142.

Adding to 200123155 its reverse (551321002), we get a palindrome (751444157).

The spelling of 200123155 in words is "two hundred million, one hundred twenty-three thousand, one hundred fifty-five".