51534501102120 has 256 divisors, whose sum is σ = 159107228985600. Its totient is φ = 13348005027840.

The previous prime is 51534501102109. The next prime is 51534501102121. The reversal of 51534501102120 is 2120110543515.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (51534501102121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1344511116 + ... + 1344549444.

It is an arithmetic number, because the mean of its divisors is an integer number (621512613225).

Almost surely, 2^{51534501102120} 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 51534501102120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79553614492800).

51534501102120 is an abundant number, since it is smaller than the sum of its proper divisors (107572727883480).

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

51534501102120 is a wasteful number, since it uses less digits than its factorization.

51534501102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40700 (or 40696 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 51534501102120 its reverse (2120110543515), we get a palindrome (53654611645635).

The spelling of 51534501102120 in words is "fifty-one trillion, five hundred thirty-four billion, five hundred one million, one hundred two thousand, one hundred twenty".