51308169 has 16 divisors (see below), whose sum is σ = 74775744. Its totient is φ = 31035200.

The previous prime is 51308149. The next prime is 51308219. The reversal of 51308169 is 96180315.

51308169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51308169 - 2⁷ = 51308041 is a prime.

It is a super-2 number, since 2×51308169² = 5265056412265122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (51308119) 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, 20359 + ... + 22739.

It is an arithmetic number, because the mean of its divisors is an integer number (4673484).

Almost surely, 2^51308169 is an apocalyptic number.

It is an amenable number.

51308169 is a deficient number, since it is larger than the sum of its proper divisors (23467575).

51308169 is a wasteful number, since it uses less digits than its factorization.

51308169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 51308169 is about 7162.9720786835. The cubic root of 51308169 is about 371.5884206798.

The spelling of 51308169 in words is "fifty-one million, three hundred eight thousand, one hundred sixty-nine".