51186631 has 2 divisors, whose sum is σ = 51186632. Its totient is φ = 51186630.

The previous prime is 51186623. The next prime is 51186637. The reversal of 51186631 is 13668115.

51186631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51186631 - 2³ = 51186623 is a prime.

It is a super-2 number, since 2×51186631² = 5240142386260322, 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 = 51186593 and 51186602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51186637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25593315 + 25593316.

It is an arithmetic number, because the mean of its divisors is an integer number (25593316).

Almost surely, 2^51186631 is an apocalyptic number.

51186631 is a deficient number, since it is larger than the sum of its proper divisors (1).

51186631 is an equidigital number, since it uses as much as digits as its factorization.

51186631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 51186631 is about 7154.4832797345. The cubic root of 51186631 is about 371.2947843959.

The spelling of 51186631 in words is "fifty-one million, one hundred eighty-six thousand, six hundred thirty-one".