51318051330 has 512 divisors, whose sum is σ = 165989376000. Its totient is φ = 10059033600.

The previous prime is 51318051293. The next prime is 51318051409. The reversal of 51318051330 is 3315081315.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 255 ways as a sum of consecutive naturals, for example, 155039265 + ... + 155039595.

It is an arithmetic number, because the mean of its divisors is an integer number (324198000).

Almost surely, 2^51318051330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51318051330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82994688000).

51318051330 is an abundant number, since it is smaller than the sum of its proper divisors (114671324670).

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

51318051330 is a wasteful number, since it uses less digits than its factorization.

51318051330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The spelling of 51318051330 in words is "fifty-one billion, three hundred eighteen million, fifty-one thousand, three hundred thirty".