51973165 has 8 divisors (see below), whose sum is σ = 66036600. Its totient is φ = 39132672.

The previous prime is 51973157. The next prime is 51973171. The reversal of 51973165 is 56137915.

It can be written as a sum of positive squares in 4 ways, for example, as 12068676 + 39904489 = 3474^2 + 6317^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51973165 - 2³ = 51973157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305640 + ... + 305809.

It is an arithmetic number, because the mean of its divisors is an integer number (8254575).

Almost surely, 2^51973165 is an apocalyptic number.

It is an amenable number.

51973165 is a deficient number, since it is larger than the sum of its proper divisors (14063435).

51973165 is a wasteful number, since it uses less digits than its factorization.

51973165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611471.

The product of its digits is 28350, while the sum is 37.

The square root of 51973165 is about 7209.2416383417. The cubic root of 51973165 is about 373.1868982640.

The spelling of 51973165 in words is "fifty-one million, nine hundred seventy-three thousand, one hundred sixty-five".