51027631 has 2 divisors, whose sum is σ = 51027632. Its totient is φ = 51027630.

The previous prime is 51027619. The next prime is 51027637. The reversal of 51027631 is 13672015.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51027631 is a prime.

It is a super-2 number, since 2×51027631² = 5207638250944322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51027596 and 51027605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51027637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25513815 + 25513816.

It is an arithmetic number, because the mean of its divisors is an integer number (25513816).

Almost surely, 2^51027631 is an apocalyptic number.

51027631 is a deficient number, since it is larger than the sum of its proper divisors (1).

51027631 is an equidigital number, since it uses as much as digits as its factorization.

51027631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 51027631 is about 7143.3627235357. The cubic root of 51027631 is about 370.9099371380.

Adding to 51027631 its reverse (13672015), we get a palindrome (64699646).

The spelling of 51027631 in words is "fifty-one million, twenty-seven thousand, six hundred thirty-one".