51045638 has 8 divisors (see below), whose sum is σ = 87506832. Its totient is φ = 21876696.

The previous prime is 51045637. The next prime is 51045641. The reversal of 51045638 is 83654015.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51045637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1823045 + ... + 1823072.

It is an arithmetic number, because the mean of its divisors is an integer number (10938354).

Almost surely, 2^51045638 is an apocalyptic number.

51045638 is a deficient number, since it is larger than the sum of its proper divisors (36461194).

51045638 is a wasteful number, since it uses less digits than its factorization.

51045638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3646126.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 51045638 is about 7144.6230131477. The cubic root of 51045638 is about 370.9535618019.

The spelling of 51045638 in words is "fifty-one million, forty-five thousand, six hundred thirty-eight".