51551101 has 8 divisors (see below), whose sum is σ = 60508160. Its totient is φ = 42992208.

The previous prime is 51551099. The next prime is 51551111. The reversal of 51551101 is 10115515.

It is a happy number.

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

It is not a de Polignac number, because 51551101 - 2¹ = 51551099 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 (51551111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99261 + ... + 99778.

It is an arithmetic number, because the mean of its divisors is an integer number (7563520).

Almost surely, 2^51551101 is an apocalyptic number.

It is an amenable number.

51551101 is a deficient number, since it is larger than the sum of its proper divisors (8957059).

51551101 is a wasteful number, since it uses less digits than its factorization.

51551101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199083.

The product of its (nonzero) digits is 125, while the sum is 19.

The square root of 51551101 is about 7179.9095398201. The cubic root of 51551101 is about 372.1739585088.

Adding to 51551101 its reverse (10115515), we get a palindrome (61666616).

The spelling of 51551101 in words is "fifty-one million, five hundred fifty-one thousand, one hundred one".