51551155441 has 8 divisors (see below), whose sum is σ = 51903801000. Its totient is φ = 51198599040.

The previous prime is 51551155387. The next prime is 51551155457. The reversal of 51551155441 is 14455115515.

It can be written as a sum of positive squares in 4 ways, for example, as 2476057600 + 49075097841 = 49760^2 + 221529^2 .

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 51551155441 - 2²³ = 51542766833 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 51551155441.

It is not an unprimeable number, because it can be changed into a prime (51551152441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1483101 + ... + 1517461.

It is an arithmetic number, because the mean of its divisors is an integer number (6487975125).

Almost surely, 2^51551155441 is an apocalyptic number.

It is an amenable number.

51551155441 is a deficient number, since it is larger than the sum of its proper divisors (352645559).

51551155441 is a wasteful number, since it uses less digits than its factorization.

51551155441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44579.

The product of its digits is 50000, while the sum is 37.

The spelling of 51551155441 in words is "fifty-one billion, five hundred fifty-one million, one hundred fifty-five thousand, four hundred forty-one".