51365549 has 8 divisors (see below), whose sum is σ = 52186680. Its totient is φ = 50550016.

The previous prime is 51365539. The next prime is 51365557. The reversal of 51365549 is 94556315.

It can be written as a sum of positive squares in 4 ways, for example, as 243049 + 51122500 = 493^2 + 7150^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51365549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51365539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19499 + ... + 21975.

It is an arithmetic number, because the mean of its divisors is an integer number (6523335).

Almost surely, 2^51365549 is an apocalyptic number.

It is an amenable number.

51365549 is a deficient number, since it is larger than the sum of its proper divisors (821131).

51365549 is a wasteful number, since it uses less digits than its factorization.

51365549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2799.

The product of its digits is 81000, while the sum is 38.

The square root of 51365549 is about 7166.9762801338. The cubic root of 51365549 is about 371.7268898593.

The spelling of 51365549 in words is "fifty-one million, three hundred sixty-five thousand, five hundred forty-nine".