51908167 has 4 divisors (see below), whose sum is σ = 53582656. Its totient is φ = 50233680.

The previous prime is 51908149. The next prime is 51908203. The reversal of 51908167 is 76180915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51908167 - 2¹⁵ = 51875399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51908137) 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 in 3 ways as a sum of consecutive naturals, for example, 837198 + ... + 837259.

It is an arithmetic number, because the mean of its divisors is an integer number (13395664).

Almost surely, 2^51908167 is an apocalyptic number.

51908167 is a deficient number, since it is larger than the sum of its proper divisors (1674489).

51908167 is a wasteful number, since it uses less digits than its factorization.

51908167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674488.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 51908167 is about 7204.7322642830. The cubic root of 51908167 is about 373.0312633270.

The spelling of 51908167 in words is "fifty-one million, nine hundred eight thousand, one hundred sixty-seven".