51336420 has 24 divisors (see below), whose sum is σ = 143742144. Its totient is φ = 13689696.

The previous prime is 51336419. The next prime is 51336433. The reversal of 51336420 is 2463315.

It is a happy number.

51336420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 in 7 ways as a sum of consecutive naturals, for example, 427744 + ... + 427863.

It is an arithmetic number, because the mean of its divisors is an integer number (5989256).

Almost surely, 2^51336420 is an apocalyptic number.

It is an amenable number.

51336420 is an abundant number, since it is smaller than the sum of its proper divisors (92405724).

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

51336420 is a wasteful number, since it uses less digits than its factorization.

51336420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855619 (or 855617 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 51336420 is about 7164.9438239249. The cubic root of 51336420 is about 371.6566087711.

Adding to 51336420 its reverse (2463315), we get a palindrome (53799735).

The spelling of 51336420 in words is "fifty-one million, three hundred thirty-six thousand, four hundred twenty".