51145601 has 8 divisors (see below), whose sum is σ = 55242600. Its totient is φ = 47071872.

The previous prime is 51145561. The next prime is 51145603. The reversal of 51145601 is 10654115.

It can be written as a sum of positive squares in 4 ways, for example, as 1809025 + 49336576 = 1345^2 + 7024^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51145601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51145603) 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 7 ways as a sum of consecutive naturals, for example, 1100 + ... + 10173.

It is an arithmetic number, because the mean of its divisors is an integer number (6905325).

Almost surely, 2^51145601 is an apocalyptic number.

It is an amenable number.

51145601 is a deficient number, since it is larger than the sum of its proper divisors (4096999).

51145601 is a wasteful number, since it uses less digits than its factorization.

51145601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11635.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 51145601 is about 7151.6152720906. The cubic root of 51145601 is about 371.1955508200.

Adding to 51145601 its reverse (10654115), we get a palindrome (61799716).

The spelling of 51145601 in words is "fifty-one million, one hundred forty-five thousand, six hundred one".