51186427 has 2 divisors, whose sum is σ = 51186428. Its totient is φ = 51186426.

The previous prime is 51186413. The next prime is 51186451. The reversal of 51186427 is 72468115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51186427 - 2⁷ = 51186299 is a prime.

It is a super-3 number, since 3×51186427³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51186392 and 51186401.

It is not a weakly prime, because it can be changed into another prime (51186467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25593213 + 25593214.

It is an arithmetic number, because the mean of its divisors is an integer number (25593214).

Almost surely, 2^51186427 is an apocalyptic number.

51186427 is a deficient number, since it is larger than the sum of its proper divisors (1).

51186427 is an equidigital number, since it uses as much as digits as its factorization.

51186427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 51186427 is about 7154.4690229255. The cubic root of 51186427 is about 371.2942911405.

The spelling of 51186427 in words is "fifty-one million, one hundred eighty-six thousand, four hundred twenty-seven".