51284436 has 48 divisors (see below), whose sum is σ = 138700800. Its totient is φ = 14444640.

The previous prime is 51284417. The next prime is 51284437. The reversal of 51284436 is 63448215.

It is a junction number, because it is equal to n+sod(n) for n = 51284397 and 51284406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51284437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1665 + ... + 10263.

It is an arithmetic number, because the mean of its divisors is an integer number (2889600).

Almost surely, 2^51284436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51284436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69350400).

51284436 is an abundant number, since it is smaller than the sum of its proper divisors (87416364).

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

51284436 is a wasteful number, since it uses less digits than its factorization.

51284436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8684 (or 8682 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 51284436 is about 7161.3152423280. The cubic root of 51284436 is about 371.5311181212.

It can be divided in two parts, 512 and 84436, that added together give a palindrome (84948).

The spelling of 51284436 in words is "fifty-one million, two hundred eighty-four thousand, four hundred thirty-six".