51839169 has 4 divisors (see below), whose sum is σ = 69118896. Its totient is φ = 34559444.

The previous prime is 51839147. The next prime is 51839191. The reversal of 51839169 is 96193815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (51839147) and next prime (51839191).

It is a cyclic number.

It is not a de Polignac number, because 51839169 - 2⁷ = 51839041 is a prime.

It is a super-2 number, since 2×51839169² = 5374598885221122, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51839169.

It is not an unprimeable number, because it can be changed into a prime (52839169) 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, 8639859 + ... + 8639864.

It is an arithmetic number, because the mean of its divisors is an integer number (17279724).

Almost surely, 2^51839169 is an apocalyptic number.

It is an amenable number.

51839169 is a deficient number, since it is larger than the sum of its proper divisors (17279727).

51839169 is a wasteful number, since it uses less digits than its factorization.

51839169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17279726.

The product of its digits is 58320, while the sum is 42.

The square root of 51839169 is about 7199.9422914354. The cubic root of 51839169 is about 372.8659083348.

The spelling of 51839169 in words is "fifty-one million, eight hundred thirty-nine thousand, one hundred sixty-nine".