200423155 has 4 divisors (see below), whose sum is σ = 240507792. Its totient is φ = 160338520.

The previous prime is 200423141. The next prime is 200423161. The reversal of 200423155 is 551324002.

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

It is not a de Polignac number, because 200423155 - 2⁵ = 200423123 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, 20042311 + ... + 20042320.

It is an arithmetic number, because the mean of its divisors is an integer number (60126948).

Almost surely, 2^200423155 is an apocalyptic number.

200423155 is a deficient number, since it is larger than the sum of its proper divisors (40084637).

200423155 is an equidigital number, since it uses as much as digits as its factorization.

200423155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40084636.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 200423155 is about 14157.0885071755. The cubic root of 200423155 is about 585.2156946843.

Adding to 200423155 its reverse (551324002), we get a palindrome (751747157).

The spelling of 200423155 in words is "two hundred million, four hundred twenty-three thousand, one hundred fifty-five".