51304287 has 8 divisors (see below), whose sum is σ = 70612480. Its totient is φ = 33099480.

The previous prime is 51304241. The next prime is 51304291. The reversal of 51304287 is 78240315.

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

It is not a de Polignac number, because 51304287 - 2⁶ = 51304223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51306287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275737 + ... + 275922.

It is an arithmetic number, because the mean of its divisors is an integer number (8826560).

Almost surely, 2^51304287 is an apocalyptic number.

51304287 is a deficient number, since it is larger than the sum of its proper divisors (19308193).

51304287 is a wasteful number, since it uses less digits than its factorization.

51304287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551693.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 51304287 is about 7162.7010966534. The cubic root of 51304287 is about 371.5790489257.

The spelling of 51304287 in words is "fifty-one million, three hundred four thousand, two hundred eighty-seven".