51204000 has 192 divisors, whose sum is σ = 178319232. Its totient is φ = 12800000.

The previous prime is 51203981. The next prime is 51204001. The reversal of 51204000 is 40215.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (51204001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203875 + ... + 204125.

It is an arithmetic number, because the mean of its divisors is an integer number (928746).

Almost surely, 2^51204000 is an apocalyptic number.

51204000 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 51204000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89159616).

51204000 is an abundant number, since it is smaller than the sum of its proper divisors (127115232).

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

51204000 is a wasteful number, since it uses less digits than its factorization.

51204000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 51204000 is about 7155.6970310376. The cubic root of 51204000 is about 371.3367764139.

Adding to 51204000 its reverse (40215), we get a palindrome (51244215).

The spelling of 51204000 in words is "fifty-one million, two hundred four thousand".