51501042000 has 320 divisors, whose sum is σ = 190855641600. Its totient is φ = 13259635200.

The previous prime is 51501041989. The next prime is 51501042031. The reversal of 51501042000 is 24010515.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1549557 + ... + 1582443.

It is an arithmetic number, because the mean of its divisors is an integer number (596423880).

Almost surely, 2^51501042000 is an apocalyptic number.

51501042000 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 51501042000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95427820800).

51501042000 is an abundant number, since it is smaller than the sum of its proper divisors (139354599600).

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

51501042000 is a wasteful number, since it uses less digits than its factorization.

51501042000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32948 (or 32926 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

Adding to 51501042000 its reverse (24010515), we get a palindrome (51525052515).

The spelling of 51501042000 in words is "fifty-one billion, five hundred one million, forty-two thousand".