51167647 has 4 divisors (see below), whose sum is σ = 51186240. Its totient is φ = 51149056.

The previous prime is 51167533. The next prime is 51167657. The reversal of 51167647 is 74676115.

51167647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51167647 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51167657) 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 3 ways as a sum of consecutive naturals, for example, 4258 + ... + 10975.

It is an arithmetic number, because the mean of its divisors is an integer number (12796560).

Almost surely, 2^51167647 is an apocalyptic number.

51167647 is a deficient number, since it is larger than the sum of its proper divisors (18593).

51167647 is a wasteful number, since it uses less digits than its factorization.

51167647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18592.

The product of its digits is 35280, while the sum is 37.

The square root of 51167647 is about 7153.1564361476. The cubic root of 51167647 is about 371.2488770197.

The spelling of 51167647 in words is "fifty-one million, one hundred sixty-seven thousand, six hundred forty-seven".