51420142225 has 24 divisors (see below), whose sum is σ = 67135876640. Its totient is φ = 38959989120.

The previous prime is 51420142217. The next prime is 51420142229. The reversal of 51420142225 is 52224102415.

It is a happy number.

51420142225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51420142225 - 2³ = 51420142217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51420142193 and 51420142202.

It is not an unprimeable number, because it can be changed into a prime (51420142229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1913734 + ... + 1940416.

Almost surely, 2^51420142225 is an apocalyptic number.

It is an amenable number.

51420142225 is a deficient number, since it is larger than the sum of its proper divisors (15715734415).

51420142225 is a wasteful number, since it uses less digits than its factorization.

51420142225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30769 (or 30764 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 51420142225 in words is "fifty-one billion, four hundred twenty million, one hundred forty-two thousand, two hundred twenty-five".