51115520443 has 8 divisors (see below), whose sum is σ = 55074994128. Its totient is φ = 47159976864.

The previous prime is 51115520441. The next prime is 51115520453. The reversal of 51115520443 is 34402551115.

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

It is not a de Polignac number, because 51115520443 - 2¹ = 51115520441 is a prime.

It is a super-2 number, since 2×51115520443² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51115520441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955480 + ... + 1007557.

It is an arithmetic number, because the mean of its divisors is an integer number (6884374266).

Almost surely, 2^51115520443 is an apocalyptic number.

51115520443 is a deficient number, since it is larger than the sum of its proper divisors (3959473685).

51115520443 is a wasteful number, since it uses less digits than its factorization.

51115520443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965053.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 51115520443 in words is "fifty-one billion, one hundred fifteen million, five hundred twenty thousand, four hundred forty-three".