51202310420 has 24 divisors (see below), whose sum is σ = 109812616704. Its totient is φ = 20045159456.

The previous prime is 51202310413. The next prime is 51202310429. The reversal of 51202310420 is 2401320215.

51202310420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 51202310392 and 51202310401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51202310429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27234332 + ... + 27236211.

It is an arithmetic number, because the mean of its divisors is an integer number (4575525696).

Almost surely, 2^51202310420 is an apocalyptic number.

It is an amenable number.

51202310420 is an abundant number, since it is smaller than the sum of its proper divisors (58610306284).

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

51202310420 is a wasteful number, since it uses less digits than its factorization.

51202310420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54470599 (or 54470597 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 51202310420 its reverse (2401320215), we get a palindrome (53603630635).

The spelling of 51202310420 in words is "fifty-one billion, two hundred two million, three hundred ten thousand, four hundred twenty".