51406871 has 2 divisors, whose sum is σ = 51406872. Its totient is φ = 51406870.

The previous prime is 51406867. The next prime is 51406891. The reversal of 51406871 is 17860415.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51406871 - 2² = 51406867 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51406811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25703435 + 25703436.

It is an arithmetic number, because the mean of its divisors is an integer number (25703436).

Almost surely, 2^51406871 is an apocalyptic number.

51406871 is a deficient number, since it is larger than the sum of its proper divisors (1).

51406871 is an equidigital number, since it uses as much as digits as its factorization.

51406871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 51406871 is about 7169.8585062747. The cubic root of 51406871 is about 371.8265440807.

The spelling of 51406871 in words is "fifty-one million, four hundred six thousand, eight hundred seventy-one".