51306005 has 8 divisors (see below), whose sum is σ = 61617024. Its totient is φ = 41011600.

The previous prime is 51306001. The next prime is 51306037. The reversal of 51306005 is 50060315.

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

It is not a de Polignac number, because 51306005 - 2² = 51306001 is a prime.

It is a super-2 number, since 2×51306005² = 5264612298120050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51306001) 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, 4160 + ... + 10950.

It is an arithmetic number, because the mean of its divisors is an integer number (7702128).

Almost surely, 2^51306005 is an apocalyptic number.

It is an amenable number.

51306005 is a deficient number, since it is larger than the sum of its proper divisors (10311019).

51306005 is a wasteful number, since it uses less digits than its factorization.

51306005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8307.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 51306005 is about 7162.8210224743. The cubic root of 51306005 is about 371.5831965043.

The spelling of 51306005 in words is "fifty-one million, three hundred six thousand, five".