51810103 has 4 divisors (see below), whose sum is σ = 51824520. Its totient is φ = 51795688.

The previous prime is 51810047. The next prime is 51810119. The reversal of 51810103 is 30101815.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51810103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51810173) 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, 3033 + ... + 10621.

It is an arithmetic number, because the mean of its divisors is an integer number (12956130).

Almost surely, 2^51810103 is an apocalyptic number.

51810103 is a deficient number, since it is larger than the sum of its proper divisors (14417).

51810103 is an equidigital number, since it uses as much as digits as its factorization.

51810103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14416.

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

The square root of 51810103 is about 7197.9235200160. The cubic root of 51810103 is about 372.7962072003.

Adding to 51810103 its reverse (30101815), we get a palindrome (81911918).

The spelling of 51810103 in words is "fifty-one million, eight hundred ten thousand, one hundred three".