51307273 has 8 divisors (see below), whose sum is σ = 53716608. Its totient is φ = 48912864.

The previous prime is 51307253. The next prime is 51307279. The reversal of 51307273 is 37270315.

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 51307273 - 2¹⁷ = 51176201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51307279) 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, 3636 + ... + 10762.

It is an arithmetic number, because the mean of its divisors is an integer number (6714576).

Almost surely, 2^51307273 is an apocalyptic number.

It is an amenable number.

51307273 is a deficient number, since it is larger than the sum of its proper divisors (2409335).

51307273 is a wasteful number, since it uses less digits than its factorization.

51307273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7463.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 51307273 is about 7162.9095345397. The cubic root of 51307273 is about 371.5862576379.

Adding to 51307273 its reverse (37270315), we get a palindrome (88577588).

It can be divided in two parts, 5130 and 7273, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 51307273 in words is "fifty-one million, three hundred seven thousand, two hundred seventy-three".