51273152111220 has 48 divisors (see below), whose sum is σ = 154608274060800. Its totient is φ = 12621083596416.

The previous prime is 51273152111197. The next prime is 51273152111221. The reversal of 51273152111220 is 2211125137215.

It is a happy number.

It is a super-2 number, since 2×51273152111220² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51273152111221) 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, 32867404420 + ... + 32867405979.

It is an arithmetic number, because the mean of its divisors is an integer number (3221005709600).

Almost surely, 2^{51273152111220} is an apocalyptic number.

It is an amenable number.

51273152111220 is an abundant number, since it is smaller than the sum of its proper divisors (103335121949580).

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

51273152111220 is a wasteful number, since it uses less digits than its factorization.

51273152111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65734810424 (or 65734810422 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 33.

Adding to 51273152111220 its reverse (2211125137215), we get a palindrome (53484277248435).

The spelling of 51273152111220 in words is "fifty-one trillion, two hundred seventy-three billion, one hundred fifty-two million, one hundred eleven thousand, two hundred twenty".