51145589 has 16 divisors (see below), whose sum is σ = 58605120. Its totient is φ = 44204160.

The previous prime is 51145561. The next prime is 51145603. The reversal of 51145589 is 98554115.

It is a de Polignac number, because none of the positive numbers 2^k-51145589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20177 + ... + 22569.

It is an arithmetic number, because the mean of its divisors is an integer number (3662820).

Almost surely, 2^51145589 is an apocalyptic number.

It is an amenable number.

51145589 is a deficient number, since it is larger than the sum of its proper divisors (7459531).

51145589 is a wasteful number, since it uses less digits than its factorization.

51145589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500.

The product of its digits is 36000, while the sum is 38.

The square root of 51145589 is about 7151.6144331193. The cubic root of 51145589 is about 371.1955217895.

The spelling of 51145589 in words is "fifty-one million, one hundred forty-five thousand, five hundred eighty-nine".