51075399 has 8 divisors (see below), whose sum is σ = 69033712. Its totient is φ = 33583680.

The previous prime is 51075391. The next prime is 51075407. The reversal of 51075399 is 99357015.

51075399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51075391) and next prime (51075407).

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

It is not a de Polignac number, because 51075399 - 2³ = 51075391 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 (51075391) 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, 116392 + ... + 116829.

It is an arithmetic number, because the mean of its divisors is an integer number (8629214).

Almost surely, 2^51075399 is an apocalyptic number.

51075399 is a deficient number, since it is larger than the sum of its proper divisors (17958313).

51075399 is a wasteful number, since it uses less digits than its factorization.

51075399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233297.

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 51075399 is about 7146.7054647579. The cubic root of 51075399 is about 371.0256398125.

The spelling of 51075399 in words is "fifty-one million, seventy-five thousand, three hundred ninety-nine".