51808967 has 16 divisors (see below), whose sum is σ = 61415424. Its totient is φ = 42768000.

The previous prime is 51808957. The next prime is 51808969. The reversal of 51808967 is 76980815.

It is a happy number.

51808967 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51808967 - 2¹² = 51804871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51808969) 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 in 15 ways as a sum of consecutive naturals, for example, 58367 + ... + 59247.

It is an arithmetic number, because the mean of its divisors is an integer number (3838464).

Almost surely, 2^51808967 is an apocalyptic number.

51808967 is a deficient number, since it is larger than the sum of its proper divisors (9606457).

51808967 is a wasteful number, since it uses less digits than its factorization.

51808967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 51808967 is about 7197.8446079365. The cubic root of 51808967 is about 372.7934825091.

The spelling of 51808967 in words is "fifty-one million, eight hundred eight thousand, nine hundred sixty-seven".