51212782 has 8 divisors (see below), whose sum is σ = 79468200. Its totient is φ = 24723384.

The previous prime is 51212779. The next prime is 51212783. The reversal of 51212782 is 28721215.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51212782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51212783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441432 + ... + 441547.

It is an arithmetic number, because the mean of its divisors is an integer number (9933525).

Almost surely, 2^51212782 is an apocalyptic number.

51212782 is a deficient number, since it is larger than the sum of its proper divisors (28255418).

51212782 is a wasteful number, since it uses less digits than its factorization.

51212782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883010.

The product of its digits is 2240, while the sum is 28.

The square root of 51212782 is about 7156.3106416645. The cubic root of 51212782 is about 371.3580045286.

Adding to 51212782 its reverse (28721215), we get a palindrome (79933997).

The spelling of 51212782 in words is "fifty-one million, two hundred twelve thousand, seven hundred eighty-two".