51215313000 has 128 divisors (see below), whose sum is σ = 160630179840. Its totient is φ = 13585760000.

The previous prime is 51215312999. The next prime is 51215313049. The reversal of 51215313000 is 31351215.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 528310 + ... + 617690.

It is an arithmetic number, because the mean of its divisors is an integer number (1254923280).

Almost surely, 2^51215313000 is an apocalyptic number.

51215313000 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 51215313000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80315089920).

51215313000 is an abundant number, since it is smaller than the sum of its proper divisors (109414866840).

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

51215313000 is a wasteful number, since it uses less digits than its factorization.

51215313000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89596 (or 89582 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

Adding to 51215313000 its reverse (31351215), we get a palindrome (51246664215).

The spelling of 51215313000 in words is "fifty-one billion, two hundred fifteen million, three hundred thirteen thousand".