51055574309 has 4 divisors (see below), whose sum is σ = 54058843404. Its totient is φ = 48052305216.

The previous prime is 51055574287. The next prime is 51055574321. The reversal of 51055574309 is 90347555015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90347555015 = 5 ⋅18069511003.

It can be written as a sum of positive squares in 2 ways, for example, as 28584664900 + 22470909409 = 169070^2 + 149903^2 .

It is a cyclic number.

It is not a de Polignac number, because 51055574309 - 2¹² = 51055570213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51055574309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51055574389) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1501634522 + ... + 1501634555.

It is an arithmetic number, because the mean of its divisors is an integer number (13514710851).

Almost surely, 2^51055574309 is an apocalyptic number.

It is an amenable number.

51055574309 is a deficient number, since it is larger than the sum of its proper divisors (3003269095).

51055574309 is a wasteful number, since it uses less digits than its factorization.

51055574309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003269094.

The product of its (nonzero) digits is 472500, while the sum is 44.

The spelling of 51055574309 in words is "fifty-one billion, fifty-five million, five hundred seventy-four thousand, three hundred nine".