51165121 has 16 divisors (see below), whose sum is σ = 62622720. Its totient is φ = 40803840.

The previous prime is 51165113. The next prime is 51165167. The reversal of 51165121 is 12156115.

It is a happy number.

51165121 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 51165121 - 2³ = 51165113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51165092 and 51165101.

It is not an unprimeable number, because it can be changed into a prime (51165721) 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, 8176 + ... + 13006.

It is an arithmetic number, because the mean of its divisors is an integer number (3913920).

Almost surely, 2^51165121 is an apocalyptic number.

It is an amenable number.

51165121 is a deficient number, since it is larger than the sum of its proper divisors (11457599).

51165121 is a wasteful number, since it uses less digits than its factorization.

51165121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4944.

The product of its digits is 300, while the sum is 22.

The square root of 51165121 is about 7152.9798685583. The cubic root of 51165121 is about 371.2427677551.

The spelling of 51165121 in words is "fifty-one million, one hundred sixty-five thousand, one hundred twenty-one".