200123513 has 4 divisors (see below), whose sum is σ = 202186740. Its totient is φ = 198060288.

The previous prime is 200123479. The next prime is 200123533. The reversal of 200123513 is 315321002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 104611984 + 95511529 = 10228^2 + 9773^2 .

It is a cyclic number.

It is not a de Polignac number, because 200123513 - 2⁶ = 200123449 is a prime.

It is a super-2 number, since 2×200123513² = 80098840910922338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200123491 and 200123500.

It is not an unprimeable number, because it can be changed into a prime (200123533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1031468 + ... + 1031661.

It is an arithmetic number, because the mean of its divisors is an integer number (50546685).

Almost surely, 2^200123513 is an apocalyptic number.

It is an amenable number.

200123513 is a deficient number, since it is larger than the sum of its proper divisors (2063227).

200123513 is an equidigital number, since it uses as much as digits as its factorization.

200123513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063226.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 200123513 is about 14146.5017937298. The cubic root of 200123513 is about 584.9239076036.

Adding to 200123513 its reverse (315321002), we get a palindrome (515444515).

The spelling of 200123513 in words is "two hundred million, one hundred twenty-three thousand, five hundred thirteen".