51560001 has 12 divisors (see below), whose sum is σ = 76292580. Its totient is φ = 33534720.

The previous prime is 51559961. The next prime is 51560009. The reversal of 51560001 is 10006515.

It can be written as a sum of positive squares in 2 ways, for example, as 3326976 + 48233025 = 1824^2 + 6945^2 .

It is not a de Polignac number, because 51560001 - 2⁹ = 51559489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51560009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69496 + ... + 70233.

It is an arithmetic number, because the mean of its divisors is an integer number (6357715).

Almost surely, 2^51560001 is an apocalyptic number.

It is an amenable number.

51560001 is a deficient number, since it is larger than the sum of its proper divisors (24732579).

51560001 is a wasteful number, since it uses less digits than its factorization.

51560001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139776 (or 139773 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 51560001 is about 7180.5292980392. The cubic root of 51560001 is about 372.1953751715.

Adding to 51560001 its reverse (10006515), we get a palindrome (61566516).

It can be divided in two parts, 515 and 60001, that added together give a square (60516 = 246²).

The spelling of 51560001 in words is "fifty-one million, five hundred sixty thousand, one".