51200250420 has 96 divisors (see below), whose sum is σ = 156903538176. Its totient is φ = 12371702400.

The previous prime is 51200250407. The next prime is 51200250427. The reversal of 51200250420 is 2405200215.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51200250427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76275 + ... + 328965.

It is an arithmetic number, because the mean of its divisors is an integer number (1634411856).

Almost surely, 2^51200250420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51200250420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78451769088).

51200250420 is an abundant number, since it is smaller than the sum of its proper divisors (105703287756).

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

51200250420 is a wasteful number, since it uses less digits than its factorization.

51200250420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253021 (or 253019 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 51200250420 its reverse (2405200215), we get a palindrome (53605450635).

The spelling of 51200250420 in words is "fifty-one billion, two hundred million, two hundred fifty thousand, four hundred twenty".