51420140126250 has 320 divisors, whose sum is σ = 149939272074240. Its totient is φ = 11508922368000.

The previous prime is 51420140126087. The next prime is 51420140126269. The reversal of 51420140126250 is 5262104102415.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 397964157 + ... + 398093343.

It is an arithmetic number, because the mean of its divisors is an integer number (468560225232).

Almost surely, 2^{51420140126250} is an apocalyptic number.

51420140126250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51420140126250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74969636037120).

51420140126250 is an abundant number, since it is smaller than the sum of its proper divisors (98519131947990).

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

51420140126250 is a wasteful number, since it uses less digits than its factorization.

51420140126250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129535 (or 129520 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 51420140126250 its reverse (5262104102415), we get a palindrome (56682244228665).

The spelling of 51420140126250 in words is "fifty-one trillion, four hundred twenty billion, one hundred forty million, one hundred twenty-six thousand, two hundred fifty".