51105315121543 has 4 divisors (see below), whose sum is σ = 52293810822088. Its totient is φ = 49916819421000.

The previous prime is 51105315121541. The next prime is 51105315121591. The reversal of 51105315121543 is 34512151350115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51105315121543 - 2¹ = 51105315121541 is a prime.

It is a super-2 number, since 2×51105315121543² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105315121541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594247850208 + ... + 594247850293.

It is an arithmetic number, because the mean of its divisors is an integer number (13073452705522).

Almost surely, 2^{51105315121543} is an apocalyptic number.

51105315121543 is a deficient number, since it is larger than the sum of its proper divisors (1188495700545).

51105315121543 is a wasteful number, since it uses less digits than its factorization.

51105315121543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188495700544.

The product of its (nonzero) digits is 45000, while the sum is 37.

Adding to 51105315121543 its reverse (34512151350115), we get a palindrome (85617466471658).

The spelling of 51105315121543 in words is "fifty-one trillion, one hundred five billion, three hundred fifteen million, one hundred twenty-one thousand, five hundred forty-three".