51108389 has 4 divisors (see below), whose sum is σ = 51132480. Its totient is φ = 51084300.

The previous prime is 51108383. The next prime is 51108401. The reversal of 51108389 is 98380115.

51108389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51108389 - 2⁴ = 51108373 is a prime.

It is a super-3 number, since 3×51108389³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51108383) 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 3 ways as a sum of consecutive naturals, for example, 8519 + ... + 13220.

It is an arithmetic number, because the mean of its divisors is an integer number (12783120).

Almost surely, 2^51108389 is an apocalyptic number.

It is an amenable number.

51108389 is a deficient number, since it is larger than the sum of its proper divisors (24091).

51108389 is a wasteful number, since it uses less digits than its factorization.

51108389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24090.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 51108389 is about 7149.0131486800. The cubic root of 51108389 is about 371.1055054080.

The spelling of 51108389 in words is "fifty-one million, one hundred eight thousand, three hundred eighty-nine".