51632005 has 4 divisors (see below), whose sum is σ = 61958412. Its totient is φ = 41305600.

The previous prime is 51631961. The next prime is 51632039. The reversal of 51632005 is 50023615.

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 11512449 + 40119556 = 3393^2 + 6334^2 .

It is not a de Polignac number, because 51632005 - 2¹⁵ = 51599237 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 3 ways as a sum of consecutive naturals, for example, 5163196 + ... + 5163205.

It is an arithmetic number, because the mean of its divisors is an integer number (15489603).

Almost surely, 2^51632005 is an apocalyptic number.

It is an amenable number.

51632005 is a deficient number, since it is larger than the sum of its proper divisors (10326407).

51632005 is a wasteful number, since it uses less digits than its factorization.

51632005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10326406.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 51632005 is about 7185.5413853098. The cubic root of 51632005 is about 372.3685526325.

The spelling of 51632005 in words is "fifty-one million, six hundred thirty-two thousand, five".