51060100561 has 8 divisors (see below), whose sum is σ = 51697955304. Its totient is φ = 50425509120.

The previous prime is 51060100549. The next prime is 51060100577. The reversal of 51060100561 is 16500106015.

It can be written as a sum of positive squares in 4 ways, for example, as 6555978961 + 44504121600 = 80969^2 + 210960^2 .

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 51060100561 - 2³¹ = 48912616913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51060100591) 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, 784330 + ... + 846931.

It is an arithmetic number, because the mean of its divisors is an integer number (6462244413).

Almost surely, 2^51060100561 is an apocalyptic number.

It is an amenable number.

51060100561 is a deficient number, since it is larger than the sum of its proper divisors (637854743).

51060100561 is a wasteful number, since it uses less digits than its factorization.

51060100561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631651.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 51060100561 its reverse (16500106015), we get a palindrome (67560206576).

The spelling of 51060100561 in words is "fifty-one billion, sixty million, one hundred thousand, five hundred sixty-one".