51375993 has 8 divisors (see below), whose sum is σ = 70172256. Its totient is φ = 33415200.

The previous prime is 51375979. The next prime is 51376007. The reversal of 51375993 is 39957315.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51375979) and next prime (51376007).

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

It is not a de Polignac number, because 51375993 - 2¹² = 51371897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51375913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208723 + ... + 208968.

It is an arithmetic number, because the mean of its divisors is an integer number (8771532).

Almost surely, 2^51375993 is an apocalyptic number.

It is an amenable number.

51375993 is a deficient number, since it is larger than the sum of its proper divisors (18796263).

51375993 is a wasteful number, since it uses less digits than its factorization.

51375993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417735.

The product of its digits is 127575, while the sum is 42.

The square root of 51375993 is about 7167.7048627856. The cubic root of 51375993 is about 371.7520821826.

The spelling of 51375993 in words is "fifty-one million, three hundred seventy-five thousand, nine hundred ninety-three".