51333400 has 96 divisors (see below), whose sum is σ = 125706240. Its totient is φ = 19474560.

The previous prime is 51333397. The next prime is 51333407. The reversal of 51333400 is 433315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51333407) 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 23 ways as a sum of consecutive naturals, for example, 404137 + ... + 404263.

It is an arithmetic number, because the mean of its divisors is an integer number (1309440).

Almost surely, 2^51333400 is an apocalyptic number.

51333400 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 51333400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62853120).

51333400 is an abundant number, since it is smaller than the sum of its proper divisors (74372840).

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

51333400 is a wasteful number, since it uses less digits than its factorization.

51333400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 51333400 is about 7164.7330724878. The cubic root of 51333400 is about 371.6493207355.

Adding to 51333400 its reverse (433315), we get a palindrome (51766715).

The spelling of 51333400 in words is "fifty-one million, three hundred thirty-three thousand, four hundred".