51312605 has 8 divisors (see below), whose sum is σ = 61683552. Its totient is φ = 40977808.

The previous prime is 51312593. The next prime is 51312617. The reversal of 51312605 is 50621315.

It is an interprime number because it is at equal distance from previous prime (51312593) and next prime (51312617).

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

It is a cyclic number.

It is not a de Polignac number, because 51312605 - 2⁴ = 51312589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5807 + ... + 11676.

It is an arithmetic number, because the mean of its divisors is an integer number (7710444).

Almost surely, 2^51312605 is an apocalyptic number.

It is an amenable number.

51312605 is a deficient number, since it is larger than the sum of its proper divisors (10370947).

51312605 is a wasteful number, since it uses less digits than its factorization.

51312605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18075.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 51312605 is about 7163.2817199940. The cubic root of 51312605 is about 371.5991292977.

The spelling of 51312605 in words is "fifty-one million, three hundred twelve thousand, six hundred five".