51145389 has 24 divisors (see below), whose sum is σ = 76408800. Its totient is φ = 32948640.

The previous prime is 51145379. The next prime is 51145403. The reversal of 51145389 is 98354115.

51145389 is a `hidden beast` number, since 5 + 114 + 538 + 9 = 666.

51145389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-51145389 is a prime.

It is a super-2 number, since 2×51145389² = 5231701631922642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145309) 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 23 ways as a sum of consecutive naturals, for example, 31602 + ... + 33180.

It is an arithmetic number, because the mean of its divisors is an integer number (3183700).

Almost surely, 2^51145389 is an apocalyptic number.

51145389 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

51145389 is a deficient number, since it is larger than the sum of its proper divisors (25263411).

51145389 is a wasteful number, since it uses less digits than its factorization.

51145389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705 (or 1702 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 51145389 is about 7151.6004502489. The cubic root of 51145389 is about 371.1950379472.

The spelling of 51145389 in words is "fifty-one million, one hundred forty-five thousand, three hundred eighty-nine".