51801204 has 144 divisors (see below), whose sum is σ = 154949760. Its totient is φ = 13178880.

The previous prime is 51801181. The next prime is 51801241. The reversal of 51801204 is 40210815.

51801204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 581992 + ... + 582080.

It is an arithmetic number, because the mean of its divisors is an integer number (1076040).

Almost surely, 2^51801204 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 51801204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77474880).

51801204 is an abundant number, since it is smaller than the sum of its proper divisors (103148556).

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

51801204 is a wasteful number, since it uses less digits than its factorization.

51801204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 51801204 is about 7197.3053290798. The cubic root of 51801204 is about 372.7748619207.

The spelling of 51801204 in words is "fifty-one million, eight hundred one thousand, two hundred four".