51695005 has 4 divisors (see below), whose sum is σ = 62034012. Its totient is φ = 41356000.

The previous prime is 51695003. The next prime is 51695041. The reversal of 51695005 is 50059615.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9847044 + 41847961 = 3138^2 + 6469^2 .

It is not a de Polignac number, because 51695005 - 2¹ = 51695003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51695003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5169496 + ... + 5169505.

It is an arithmetic number, because the mean of its divisors is an integer number (15508503).

Almost surely, 2^51695005 is an apocalyptic number.

It is an amenable number.

51695005 is a deficient number, since it is larger than the sum of its proper divisors (10339007).

51695005 is a wasteful number, since it uses less digits than its factorization.

51695005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10339006.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 51695005 is about 7189.9238521698. The cubic root of 51695005 is about 372.5199424784.

The spelling of 51695005 in words is "fifty-one million, six hundred ninety-five thousand, five".