51630103 has 4 divisors (see below), whose sum is σ = 59005840. Its totient is φ = 44254368.

The previous prime is 51630091. The next prime is 51630149. The reversal of 51630103 is 30103615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30103615 = 5 ⋅6020723.

It is a cyclic number.

It is not a de Polignac number, because 51630103 - 2¹⁷ = 51499031 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 (51640103) 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, 3687858 + ... + 3687871.

It is an arithmetic number, because the mean of its divisors is an integer number (14751460).

Almost surely, 2^51630103 is an apocalyptic number.

51630103 is a deficient number, since it is larger than the sum of its proper divisors (7375737).

51630103 is an equidigital number, since it uses as much as digits as its factorization.

51630103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7375736.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 51630103 is about 7185.4090349819. The cubic root of 51630103 is about 372.3639801864.

Adding to 51630103 its reverse (30103615), we get a palindrome (81733718).

The spelling of 51630103 in words is "fifty-one million, six hundred thirty thousand, one hundred three".