51862784 has 54 divisors (see below), whose sum is σ = 110127654. Its totient is φ = 24371200.

The previous prime is 51862781. The next prime is 51862787. The reversal of 51862784 is 48726815.

It is an interprime number because it is at equal distance from previous prime (51862781) and next prime (51862787).

It can be written as a sum of positive squares in 3 ways, for example, as 31360000 + 20502784 = 5600^2 + 4528^2 .

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51862781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73634 + ... + 74334.

It is an arithmetic number, because the mean of its divisors is an integer number (2039401).

Almost surely, 2^51862784 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 51862784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55063827).

51862784 is an abundant number, since it is smaller than the sum of its proper divisors (58264870).

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

51862784 is an equidigital number, since it uses as much as digits as its factorization.

51862784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 720 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 51862784 is about 7201.5820484113. The cubic root of 51862784 is about 372.9225186283.

The spelling of 51862784 in words is "fifty-one million, eight hundred sixty-two thousand, seven hundred eighty-four".