51205167 has 12 divisors (see below), whose sum is σ = 79652664. Its totient is φ = 31510800.

The previous prime is 51205163. The next prime is 51205177. The reversal of 51205167 is 76150215.

51205167 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51205167 - 2² = 51205163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51205167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51205163) 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 11 ways as a sum of consecutive naturals, for example, 218709 + ... + 218942.

It is an arithmetic number, because the mean of its divisors is an integer number (6637722).

Almost surely, 2^51205167 is an apocalyptic number.

51205167 is a deficient number, since it is larger than the sum of its proper divisors (28447497).

51205167 is a wasteful number, since it uses less digits than its factorization.

51205167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437670 (or 437667 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 51205167 is about 7155.7785739918. The cubic root of 51205167 is about 371.3395974613.

The spelling of 51205167 in words is "fifty-one million, two hundred five thousand, one hundred sixty-seven".