51382165 has 8 divisors (see below), whose sum is σ = 61746048. Its totient is φ = 41047440.

The previous prime is 51382151. The next prime is 51382169. The reversal of 51382165 is 56128315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51382165 - 2¹⁷ = 51251093 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 (51382169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3201 + ... + 10630.

It is an arithmetic number, because the mean of its divisors is an integer number (7718256).

Almost surely, 2^51382165 is an apocalyptic number.

It is an amenable number.

51382165 is a deficient number, since it is larger than the sum of its proper divisors (10363883).

51382165 is a wasteful number, since it uses less digits than its factorization.

51382165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14579.

The product of its digits is 7200, while the sum is 31.

The square root of 51382165 is about 7168.1353921365. The cubic root of 51382165 is about 371.7669682661.

The spelling of 51382165 in words is "fifty-one million, three hundred eighty-two thousand, one hundred sixty-five".