51589278 has 48 divisors (see below), whose sum is σ = 124161840. Its totient is φ = 15870816.

The previous prime is 51589259. The next prime is 51589283. The reversal of 51589278 is 87298515.

It is a happy number.

It is a super-2 number, since 2×51589278² = 5322907209122568, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6300 + ... + 11952.

It is an arithmetic number, because the mean of its divisors is an integer number (2586705).

Almost surely, 2^51589278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51589278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62080920).

51589278 is an abundant number, since it is smaller than the sum of its proper divisors (72572562).

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

51589278 is a wasteful number, since it uses less digits than its factorization.

51589278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5690 (or 5671 counting only the distinct ones).

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

The square root of 51589278 is about 7182.5676467403. The cubic root of 51589278 is about 372.2658089830.

The spelling of 51589278 in words is "fifty-one million, five hundred eighty-nine thousand, two hundred seventy-eight".