51103542163220 has 24 divisors (see below), whose sum is σ = 109136378181600. Its totient is φ = 20094952172192.

The previous prime is 51103542163189. The next prime is 51103542163249. The reversal of 51103542163220 is 2236124530115.

It is a super-2 number, since 2×51103542163220² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21654042110 + ... + 21654044469.

It is an arithmetic number, because the mean of its divisors is an integer number (4547349090900).

Almost surely, 2^{51103542163220} is an apocalyptic number.

It is an amenable number.

51103542163220 is an abundant number, since it is smaller than the sum of its proper divisors (58032836018380).

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

51103542163220 is a wasteful number, since it uses less digits than its factorization.

51103542163220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43308086647 (or 43308086645 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 51103542163220 its reverse (2236124530115), we get a palindrome (53339666693335).

The spelling of 51103542163220 in words is "fifty-one trillion, one hundred three billion, five hundred forty-two million, one hundred sixty-three thousand, two hundred twenty".