51009100 has 36 divisors (see below), whose sum is σ = 113055264. Its totient is φ = 19967680.

The previous prime is 51009097. The next prime is 51009121. The reversal of 51009100 is 190015.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 727 + ... + 10126.

It is an arithmetic number, because the mean of its divisors is an integer number (3140424).

Almost surely, 2^51009100 is an apocalyptic number.

51009100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51009100 is an abundant number, since it is smaller than the sum of its proper divisors (62046164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51009100 is a wasteful number, since it uses less digits than its factorization.

51009100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10914 (or 10907 counting only the distinct ones).

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 51009100 is about 7142.0655275627. The cubic root of 51009100 is about 370.8650322887.

Adding to 51009100 its reverse (190015), we get a palindrome (51199115).

The spelling of 51009100 in words is "fifty-one million, nine thousand, one hundred".