51282318 has 48 divisors (see below), whose sum is σ = 108936576. Its totient is φ = 16090800.

The previous prime is 51282317. The next prime is 51282337. The reversal of 51282318 is 81328215.

It is a super-2 number, since 2×51282318² = 5259752278906248, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51282313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 339543 + ... + 339693.

It is an arithmetic number, because the mean of its divisors is an integer number (2269512).

Almost surely, 2^51282318 is an apocalyptic number.

51282318 is an abundant number, since it is smaller than the sum of its proper divisors (57654258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51282318 is a wasteful number, since it uses less digits than its factorization.

51282318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 286 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The square root of 51282318 is about 7161.1673629374. The cubic root of 51282318 is about 371.5260034197.

The spelling of 51282318 in words is "fifty-one million, two hundred eighty-two thousand, three hundred eighteen".