51204553000 has 64 divisors (see below), whose sum is σ = 120612510720. Its totient is φ = 20346120000.

The previous prime is 51204552991. The next prime is 51204553003. The reversal of 51204553000 is 35540215.

51204553000 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 (25).

It is not an unprimeable number, because it can be changed into a prime (51204553003) 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, 18552 + ... + 320551.

It is an arithmetic number, because the mean of its divisors is an integer number (1884570480).

Almost surely, 2^51204553000 is an apocalyptic number.

51204553000 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 51204553000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60306255360).

51204553000 is an abundant number, since it is smaller than the sum of its proper divisors (69407957720).

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

51204553000 is a wasteful number, since it uses less digits than its factorization.

51204553000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339275 (or 339261 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The spelling of 51204553000 in words is "fifty-one billion, two hundred four million, five hundred fifty-three thousand".