51205213156144 has 80 divisors (see below), whose sum is σ = 101732482811520. Its totient is φ = 24954249922560.

The previous prime is 51205213156129. The next prime is 51205213156213. The reversal of 51205213156144 is 44165131250215.

It is a super-2 number, since 2×51205213156144² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51205213156097 and 51205213156106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620575339 + ... + 620657845.

It is an arithmetic number, because the mean of its divisors is an integer number (1271656035144).

Almost surely, 2^{51205213156144} is an apocalyptic number.

It is an amenable number.

51205213156144 is a deficient number, since it is larger than the sum of its proper divisors (50527269655376).

51205213156144 is a wasteful number, since it uses less digits than its factorization.

51205213156144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84458 (or 84452 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 51205213156144 in words is "fifty-one trillion, two hundred five billion, two hundred thirteen million, one hundred fifty-six thousand, one hundred forty-four".