51522115140220 has 12 divisors (see below), whose sum is σ = 108196441794504. Its totient is φ = 20608846056080.

The previous prime is 51522115140173. The next prime is 51522115140227. The reversal of 51522115140220 is 2204151122515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51522115140227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288052878486 + ... + 1288052878525.

It is an arithmetic number, because the mean of its divisors is an integer number (9016370149542).

Almost surely, 2^{51522115140220} is an apocalyptic number.

It is an amenable number.

51522115140220 is an abundant number, since it is smaller than the sum of its proper divisors (56674326654284).

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

51522115140220 is a wasteful number, since it uses less digits than its factorization.

51522115140220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576105757020 (or 2576105757018 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 31.

Adding to 51522115140220 its reverse (2204151122515), we get a palindrome (53726266262735).

The spelling of 51522115140220 in words is "fifty-one trillion, five hundred twenty-two billion, one hundred fifteen million, one hundred forty thousand, two hundred twenty".