51443000 has 64 divisors (see below), whose sum is σ = 137592000. Its totient is φ = 17635200.

The previous prime is 51442997. The next prime is 51443009. The reversal of 51443000 is 34415.

It is a self number, because there is not a number n which added to its sum of digits gives 51443000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51443009) 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, 3326 + ... + 10674.

It is an arithmetic number, because the mean of its divisors is an integer number (2149875).

Almost surely, 2^51443000 is an apocalyptic number.

51443000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51443000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68796000).

51443000 is an abundant number, since it is smaller than the sum of its proper divisors (86149000).

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

51443000 is a wasteful number, since it uses less digits than its factorization.

51443000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7377 (or 7363 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 51443000 is about 7172.3775695372. The cubic root of 51443000 is about 371.9136308525.

Adding to 51443000 its reverse (34415), we get a palindrome (51477415).

The spelling of 51443000 in words is "fifty-one million, four hundred forty-three thousand".