51127631 has 2 divisors, whose sum is σ = 51127632. Its totient is φ = 51127630.

The previous prime is 51127589. The next prime is 51127639. The reversal of 51127631 is 13672115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51127631 - 2¹⁸ = 50865487 is a prime.

It is a super-2 number, since 2×51127631² = 5228069303344322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51127631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51127639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25563815 + 25563816.

It is an arithmetic number, because the mean of its divisors is an integer number (25563816).

Almost surely, 2^51127631 is an apocalyptic number.

51127631 is a deficient number, since it is larger than the sum of its proper divisors (1).

51127631 is an equidigital number, since it uses as much as digits as its factorization.

51127631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 26.

The square root of 51127631 is about 7150.3588021861. The cubic root of 51127631 is about 371.1520725587.

Adding to 51127631 its reverse (13672115), we get a palindrome (64799746).

The spelling of 51127631 in words is "fifty-one million, one hundred twenty-seven thousand, six hundred thirty-one".