51312103 has 16 divisors (see below), whose sum is σ = 59685120. Its totient is φ = 43756416.

The previous prime is 51312101. The next prime is 51312113. The reversal of 51312103 is 30121315.

It is a cyclic number.

It is not a de Polignac number, because 51312103 - 2¹ = 51312101 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312101) 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 15 ways as a sum of consecutive naturals, for example, 3976 + ... + 10882.

It is an arithmetic number, because the mean of its divisors is an integer number (3730320).

Almost surely, 2^51312103 is an apocalyptic number.

51312103 is a deficient number, since it is larger than the sum of its proper divisors (8373017).

51312103 is a wasteful number, since it uses less digits than its factorization.

51312103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 51312103 is about 7163.2466801025. The cubic root of 51312103 is about 371.5979174878.

Adding to 51312103 its reverse (30121315), we get a palindrome (81433418).

It can be divided in two parts, 51312 and 103, that added together give a palindrome (51415).

The spelling of 51312103 in words is "fifty-one million, three hundred twelve thousand, one hundred three".