51356020 has 12 divisors (see below), whose sum is σ = 107847684. Its totient is φ = 20542400.

The previous prime is 51356017. The next prime is 51356021. The reversal of 51356020 is 2065315.

It is a happy number.

51356020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 19749136 + 31606884 = 4444^2 + 5622^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51355982 and 51356000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51356021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1283881 + ... + 1283920.

It is an arithmetic number, because the mean of its divisors is an integer number (8987307).

Almost surely, 2^51356020 is an apocalyptic number.

It is an amenable number.

51356020 is an abundant number, since it is smaller than the sum of its proper divisors (56491664).

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

51356020 is a wasteful number, since it uses less digits than its factorization.

51356020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567810 (or 2567808 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 51356020 is about 7166.3114640657. The cubic root of 51356020 is about 371.7039016590.

The spelling of 51356020 in words is "fifty-one million, three hundred fifty-six thousand, twenty".