51530131 has 2 divisors, whose sum is σ = 51530132. Its totient is φ = 51530130.

The previous prime is 51530113. The next prime is 51530137. The reversal of 51530131 is 13103515.

Together with previous prime (51530113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51530131 - 2⁹ = 51529619 is a prime.

It is a super-2 number, since 2×51530131² = 5310708801754322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51530099 and 51530108.

It is not a weakly prime, because it can be changed into another prime (51530137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25765065 + 25765066.

It is an arithmetic number, because the mean of its divisors is an integer number (25765066).

Almost surely, 2^51530131 is an apocalyptic number.

51530131 is a deficient number, since it is larger than the sum of its proper divisors (1).

51530131 is an equidigital number, since it uses as much as digits as its factorization.

51530131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 51530131 is about 7178.4490664767. The cubic root of 51530131 is about 372.1234872531.

Adding to 51530131 its reverse (13103515), we get a palindrome (64633646).

The spelling of 51530131 in words is "fifty-one million, five hundred thirty thousand, one hundred thirty-one".