51031385 has 8 divisors (see below), whose sum is σ = 61378560. Its totient is φ = 40731184.

The previous prime is 51031381. The next prime is 51031391. The reversal of 51031385 is 58313015.

51031385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51031385 - 2² = 51031381 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51031381) 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, 9305 + ... + 13734.

It is an arithmetic number, because the mean of its divisors is an integer number (7672320).

Almost surely, 2^51031385 is an apocalyptic number.

It is an amenable number.

51031385 is a deficient number, since it is larger than the sum of its proper divisors (10347175).

51031385 is a wasteful number, since it uses less digits than its factorization.

51031385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23487.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 51031385 is about 7143.6254801046. The cubic root of 51031385 is about 370.9190326139.

The spelling of 51031385 in words is "fifty-one million, thirty-one thousand, three hundred eighty-five".