51667871 has 2 divisors, whose sum is σ = 51667872. Its totient is φ = 51667870.

The previous prime is 51667823. The next prime is 51667883. The reversal of 51667871 is 17876615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51667871 - 2⁶ = 51667807 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51667801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25833935 + 25833936.

It is an arithmetic number, because the mean of its divisors is an integer number (25833936).

Almost surely, 2^51667871 is an apocalyptic number.

51667871 is a deficient number, since it is larger than the sum of its proper divisors (1).

51667871 is an equidigital number, since it uses as much as digits as its factorization.

51667871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The square root of 51667871 is about 7188.0366582259. The cubic root of 51667871 is about 372.4547541999.

The spelling of 51667871 in words is "fifty-one million, six hundred sixty-seven thousand, eight hundred seventy-one".