51304831 has 2 divisors, whose sum is σ = 51304832. Its totient is φ = 51304830.

The previous prime is 51304763. The next prime is 51304849. The reversal of 51304831 is 13840315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51304831 - 2¹³ = 51296639 is a prime.

It is a super-2 number, since 2×51304831² = 5264371367877122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51304796 and 51304805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51304531) 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, 25652415 + 25652416.

It is an arithmetic number, because the mean of its divisors is an integer number (25652416).

Almost surely, 2^51304831 is an apocalyptic number.

51304831 is a deficient number, since it is larger than the sum of its proper divisors (1).

51304831 is an equidigital number, since it uses as much as digits as its factorization.

51304831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 51304831 is about 7162.7390710538. The cubic root of 51304831 is about 371.5803622551.

It can be divided in two parts, 51304 and 831, that multiplied together give a palindrome (42633624).

The spelling of 51304831 in words is "fifty-one million, three hundred four thousand, eight hundred thirty-one".