51073561 has 16 divisors (see below), whose sum is σ = 64281600. Its totient is φ = 39419280.

The previous prime is 51073541. The next prime is 51073567. The reversal of 51073561 is 16537015.

It is a cyclic number.

It is not a de Polignac number, because 51073561 - 2¹⁵ = 51040793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51073567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5140 + ... + 11338.

It is an arithmetic number, because the mean of its divisors is an integer number (4017600).

Almost surely, 2^51073561 is an apocalyptic number.

It is an amenable number.

51073561 is a deficient number, since it is larger than the sum of its proper divisors (13208039).

51073561 is a wasteful number, since it uses less digits than its factorization.

51073561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6324.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 51073561 is about 7146.5768728812. The cubic root of 51073561 is about 371.0211891812.

It can be divided in two parts, 5107 and 3561, that added together give a palindrome (8668).

The spelling of 51073561 in words is "fifty-one million, seventy-three thousand, five hundred sixty-one".