51731282 has 4 divisors (see below), whose sum is σ = 77596926. Its totient is φ = 25865640.

The previous prime is 51731263. The next prime is 51731293. The reversal of 51731282 is 28213715.

51731282 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28213715 = 5 ⋅5642743.

It can be written as a sum of positive squares in only one way, i.e., 48594841 + 3136441 = 6971^2 + 1771^2 .

It is a super-2 number, since 2×51731282² = 5352251074727048, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12932819 + ... + 12932822.

Almost surely, 2^51731282 is an apocalyptic number.

51731282 is a deficient number, since it is larger than the sum of its proper divisors (25865644).

51731282 is a wasteful number, since it uses less digits than its factorization.

51731282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25865643.

The product of its digits is 3360, while the sum is 29.

The square root of 51731282 is about 7192.4461763714. The cubic root of 51731282 is about 372.6070607990.

Adding to 51731282 its reverse (28213715), we get a palindrome (79944997).

The spelling of 51731282 in words is "fifty-one million, seven hundred thirty-one thousand, two hundred eighty-two".