51638201 has 8 divisors (see below), whose sum is σ = 52436160. Its totient is φ = 50844592.

The previous prime is 51638179. The next prime is 51638261. The reversal of 51638201 is 10283615.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51638201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51638261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28931 + ... + 30663.

It is an arithmetic number, because the mean of its divisors is an integer number (6554520).

Almost surely, 2^51638201 is an apocalyptic number.

It is an amenable number.

51638201 is a deficient number, since it is larger than the sum of its proper divisors (797959).

51638201 is a wasteful number, since it uses less digits than its factorization.

51638201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 51638201 is about 7185.9725159508. The cubic root of 51638201 is about 372.3834471620.

The spelling of 51638201 in words is "fifty-one million, six hundred thirty-eight thousand, two hundred one".