51367831 has 2 divisors, whose sum is σ = 51367832. Its totient is φ = 51367830.

The previous prime is 51367807. The next prime is 51367871. The reversal of 51367831 is 13876315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51367831 - 2⁷ = 51367703 is a prime.

It is a super-2 number, since 2×51367831² = 5277308123289122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51367801) 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 as a sum of consecutive naturals, namely, 25683915 + 25683916.

It is an arithmetic number, because the mean of its divisors is an integer number (25683916).

Almost surely, 2^51367831 is an apocalyptic number.

51367831 is a deficient number, since it is larger than the sum of its proper divisors (1).

51367831 is an equidigital number, since it uses as much as digits as its factorization.

51367831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 51367831 is about 7167.1354807901. The cubic root of 51367831 is about 371.7323946397.

The spelling of 51367831 in words is "fifty-one million, three hundred sixty-seven thousand, eight hundred thirty-one".