51589872 has 70 divisors (see below), whose sum is σ = 149898392. Its totient is φ = 17192736.

The previous prime is 51589871. The next prime is 51589873. The reversal of 51589872 is 27898515.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51589871) and next prime (51589873).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51589871) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 9453 + ... + 13875.

Almost surely, 2^51589872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51589872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74949196).

51589872 is an abundant number, since it is smaller than the sum of its proper divisors (98308520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51589872 is an equidigital number, since it uses as much as digits as its factorization.

51589872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4449 (or 4428 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 51589872 is about 7182.6089967365. The cubic root of 51589872 is about 372.2672377362.

The spelling of 51589872 in words is "fifty-one million, five hundred eighty-nine thousand, eight hundred seventy-two".