51030631 has 2 divisors, whose sum is σ = 51030632. Its totient is φ = 51030630.

The previous prime is 51030593. The next prime is 51030643. The reversal of 51030631 is 13603015.

51030631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51030631 - 2¹¹ = 51028583 is a prime.

It is a super-2 number, since 2×51030631² = 5208250600516322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51030599 and 51030608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51030671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25515315 + 25515316.

It is an arithmetic number, because the mean of its divisors is an integer number (25515316).

Almost surely, 2^51030631 is an apocalyptic number.

51030631 is a deficient number, since it is larger than the sum of its proper divisors (1).

51030631 is an equidigital number, since it uses as much as digits as its factorization.

51030631 is an odious number, because the sum of its binary digits is odd.

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

The square root of 51030631 is about 7143.5727055865. The cubic root of 51030631 is about 370.9172058013.

Adding to 51030631 its reverse (13603015), we get a palindrome (64633646).

The spelling of 51030631 in words is "fifty-one million, thirty thousand, six hundred thirty-one".