51012103 has 4 divisors (see below), whose sum is σ = 51054840. Its totient is φ = 50969368.

The previous prime is 51012079. The next prime is 51012107. The reversal of 51012103 is 30121015.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51012103 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 (51012107) 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, 19525 + ... + 21982.

It is an arithmetic number, because the mean of its divisors is an integer number (12763710).

Almost surely, 2^51012103 is an apocalyptic number.

51012103 is a deficient number, since it is larger than the sum of its proper divisors (42737).

51012103 is a wasteful number, since it uses less digits than its factorization.

51012103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42736.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 51012103 is about 7142.2757577680. The cubic root of 51012103 is about 370.8723099825.

Adding to 51012103 its reverse (30121015), we get a palindrome (81133118).

It can be divided in two parts, 51012 and 103, that added together give a palindrome (51115).

The spelling of 51012103 in words is "fifty-one million, twelve thousand, one hundred three".