51443316 has 48 divisors (see below), whose sum is σ = 133996800. Its totient is φ = 17067456.

The previous prime is 51443311. The next prime is 51443323. The reversal of 51443316 is 61334415.

51443316 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51443316² = 5292829522151712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 51443316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51443311) 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 15 ways as a sum of consecutive naturals, for example, 24816 + ... + 26808.

It is an arithmetic number, because the mean of its divisors is an integer number (2791600).

Almost surely, 2^51443316 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 51443316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66998400).

51443316 is an abundant number, since it is smaller than the sum of its proper divisors (82553484).

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

51443316 is a wasteful number, since it uses less digits than its factorization.

51443316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245 (or 2237 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 51443316 is about 7172.3995984608. The cubic root of 51443316 is about 371.9143923716.

The spelling of 51443316 in words is "fifty-one million, four hundred forty-three thousand, three hundred sixteen".