501800113 has 2 divisors, whose sum is σ = 501800114. Its totient is φ = 501800112.

The previous prime is 501800111. The next prime is 501800119. The reversal of 501800113 is 311008105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 448041889 + 53758224 = 21167^2 + 7332^2 .

It is a cyclic number.

It is not a de Polignac number, because 501800113 - 2¹ = 501800111 is a prime.

Together with 501800111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (501800111) 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 as a sum of consecutive naturals, namely, 250900056 + 250900057.

It is an arithmetic number, because the mean of its divisors is an integer number (250900057).

Almost surely, 2^501800113 is an apocalyptic number.

It is an amenable number.

501800113 is a deficient number, since it is larger than the sum of its proper divisors (1).

501800113 is an equidigital number, since it uses as much as digits as its factorization.

501800113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 501800113 is about 22400.8953615698. The cubic root of 501800113 is about 794.6518856159.

Adding to 501800113 its reverse (311008105), we get a palindrome (812808218).

The spelling of 501800113 in words is "five hundred one million, eight hundred thousand, one hundred thirteen".