51310005 has 8 divisors (see below), whose sum is σ = 82096032. Its totient is φ = 27365328.

The previous prime is 51310003. The next prime is 51310027. The reversal of 51310005 is 50001315.

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

It is not a de Polignac number, because 51310005 - 2¹ = 51310003 is a prime.

It is a super-2 number, since 2×51310005² = 5265433226200050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 3420667 = 51310005 / (5 + 1 + 3 + 1 + 0 + 0 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51310003) 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, 1710319 + ... + 1710348.

It is an arithmetic number, because the mean of its divisors is an integer number (10262004).

Almost surely, 2^51310005 is an apocalyptic number.

It is an amenable number.

51310005 is a deficient number, since it is larger than the sum of its proper divisors (30786027).

51310005 is a wasteful number, since it uses less digits than its factorization.

51310005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420675.

The product of its (nonzero) digits is 75, while the sum is 15.

The square root of 51310005 is about 7163.1002366294. The cubic root of 51310005 is about 371.5928529058.

The spelling of 51310005 in words is "fifty-one million, three hundred ten thousand, five".