51211404545243 has 8 divisors (see below), whose sum is σ = 52911128295168. Its totient is φ = 49534806288744.

The previous prime is 51211404545221. The next prime is 51211404545311. The reversal of 51211404545243 is 34254540411215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51211404545243 - 2¹⁴ = 51211404528859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51211404545243.

It is not an unprimeable number, because it can be changed into a prime (51211404548243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5781368855 + ... + 5781377712.

It is an arithmetic number, because the mean of its divisors is an integer number (6613891036896).

Almost surely, 2^{51211404545243} is an apocalyptic number.

51211404545243 is a deficient number, since it is larger than the sum of its proper divisors (1699723749925).

51211404545243 is a wasteful number, since it uses less digits than its factorization.

51211404545243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11562746713.

The product of its (nonzero) digits is 384000, while the sum is 41.

Adding to 51211404545243 its reverse (34254540411215), we get a palindrome (85465944956458).

The spelling of 51211404545243 in words is "fifty-one trillion, two hundred eleven billion, four hundred four million, five hundred forty-five thousand, two hundred forty-three".