51669845 has 8 divisors (see below), whose sum is σ = 64699776. Its totient is φ = 39538576.

The previous prime is 51669841. The next prime is 51669853. The reversal of 51669845 is 54896615.

51669845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51669845 - 2² = 51669841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51669796 and 51669805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51669841) 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 7 ways as a sum of consecutive naturals, for example, 224537 + ... + 224766.

It is an arithmetic number, because the mean of its divisors is an integer number (8087472).

Almost surely, 2^51669845 is an apocalyptic number.

It is an amenable number.

51669845 is a deficient number, since it is larger than the sum of its proper divisors (13029931).

51669845 is a wasteful number, since it uses less digits than its factorization.

51669845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449331.

The product of its digits is 259200, while the sum is 44.

The square root of 51669845 is about 7188.1739684012. The cubic root of 51669845 is about 372.4594974205.

The spelling of 51669845 in words is "fifty-one million, six hundred sixty-nine thousand, eight hundred forty-five".