51038993 has 8 divisors (see below), whose sum is σ = 51576000. Its totient is φ = 50504688.

The previous prime is 51038983. The next prime is 51039007. The reversal of 51038993 is 39983015.

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 51038993 - 2¹⁰ = 51037969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51038903) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 82955 + ... + 83567.

It is an arithmetic number, because the mean of its divisors is an integer number (6447000).

Almost surely, 2^51038993 is an apocalyptic number.

It is an amenable number.

51038993 is a deficient number, since it is larger than the sum of its proper divisors (537007).

51038993 is a wasteful number, since it uses less digits than its factorization.

51038993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 51038993 is about 7144.1579629793. The cubic root of 51038993 is about 370.9374644853.

The spelling of 51038993 in words is "fifty-one million, thirty-eight thousand, nine hundred ninety-three".