51006393 has 12 divisors (see below), whose sum is σ = 77553840. Its totient is φ = 32214456.

The previous prime is 51006391. The next prime is 51006401. The reversal of 51006393 is 39360015.

51006393 is a `hidden beast` number, since 510 + 0 + 63 + 93 = 666.

51006393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51006393 - 2¹ = 51006391 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51006391) 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 11 ways as a sum of consecutive naturals, for example, 148971 + ... + 149312.

It is an arithmetic number, because the mean of its divisors is an integer number (6462820).

Almost surely, 2^51006393 is an apocalyptic number.

It is an amenable number.

51006393 is a deficient number, since it is larger than the sum of its proper divisors (26547447).

51006393 is a wasteful number, since it uses less digits than its factorization.

51006393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298308 (or 298305 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 51006393 is about 7141.8760140456. The cubic root of 51006393 is about 370.8584716985.

The spelling of 51006393 in words is "fifty-one million, six thousand, three hundred ninety-three".