51054402000 has 320 divisors, whose sum is σ = 190931779584. Its totient is φ = 11494771200.

The previous prime is 51054401999. The next prime is 51054402037. The reversal of 51054402000 is 20445015.

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 (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2804929 + ... + 2823071.

Almost surely, 2^51054402000 is an apocalyptic number.

51054402000 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 51054402000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95465889792).

51054402000 is an abundant number, since it is smaller than the sum of its proper divisors (139877377584).

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

51054402000 is a wasteful number, since it uses less digits than its factorization.

51054402000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18243 (or 18227 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 51054402000 its reverse (20445015), we get a palindrome (51074847015).

The spelling of 51054402000 in words is "fifty-one billion, fifty-four million, four hundred two thousand".