51385383 has 48 divisors (see below), whose sum is σ = 88897536. Its totient is φ = 27984960.

The previous prime is 51385379. The next prime is 51385417. The reversal of 51385383 is 38358315.

It is not a de Polignac number, because 51385383 - 2² = 51385379 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51385333) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161941 + ... + 162257.

It is an arithmetic number, because the mean of its divisors is an integer number (1852032).

Almost surely, 2^51385383 is an apocalyptic number.

51385383 is a deficient number, since it is larger than the sum of its proper divisors (37512153).

51385383 is a wasteful number, since it uses less digits than its factorization.

51385383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 441 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 51385383 is about 7168.3598542484. The cubic root of 51385383 is about 371.7747292024.

The spelling of 51385383 in words is "fifty-one million, three hundred eighty-five thousand, three hundred eighty-three".