51015109 has 8 divisors (see below), whose sum is σ = 51561720. Its totient is φ = 50471616.

The previous prime is 51015103. The next prime is 51015131. The reversal of 51015109 is 90151015.

51015109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2712609 + 48302500 = 1647^2 + 6950^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51015109 - 2⁵ = 51015077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51015109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51015103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45447 + ... + 46555.

It is an arithmetic number, because the mean of its divisors is an integer number (6445215).

Almost surely, 2^51015109 is an apocalyptic number.

It is an amenable number.

51015109 is a deficient number, since it is larger than the sum of its proper divisors (546611).

51015109 is a wasteful number, since it uses less digits than its factorization.

51015109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 51015109 is about 7142.4861917962. The cubic root of 51015109 is about 370.8795946607.

The spelling of 51015109 in words is "fifty-one million, fifteen thousand, one hundred nine".