51866167 has 4 divisors (see below), whose sum is σ = 54917136. Its totient is φ = 48815200.

The previous prime is 51866153. The next prime is 51866197. The reversal of 51866167 is 76166815.

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 51866167 - 2¹¹ = 51864119 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 (51866147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1525459 + ... + 1525492.

It is an arithmetic number, because the mean of its divisors is an integer number (13729284).

Almost surely, 2^51866167 is an apocalyptic number.

51866167 is a deficient number, since it is larger than the sum of its proper divisors (3050969).

51866167 is a wasteful number, since it uses less digits than its factorization.

51866167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050968.

The product of its digits is 60480, while the sum is 40.

The square root of 51866167 is about 7201.8169235270. The cubic root of 51866167 is about 372.9306270081.

The spelling of 51866167 in words is "fifty-one million, eight hundred sixty-six thousand, one hundred sixty-seven".