51227865712 has 80 divisors (see below), whose sum is σ = 104758920000. Its totient is φ = 24230449152.

The previous prime is 51227865709. The next prime is 51227865713. The reversal of 51227865712 is 21756872215.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51227865713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34403464 + ... + 34404952.

It is an arithmetic number, because the mean of its divisors is an integer number (1309486500).

Almost surely, 2^51227865712 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 51227865712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52379460000).

51227865712 is an abundant number, since it is smaller than the sum of its proper divisors (53531054288).

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

51227865712 is a wasteful number, since it uses less digits than its factorization.

51227865712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978 (or 2972 counting only the distinct ones).

The product of its digits is 470400, while the sum is 46.

The spelling of 51227865712 in words is "fifty-one billion, two hundred twenty-seven million, eight hundred sixty-five thousand, seven hundred twelve".