51304140000 has 180 divisors, whose sum is σ = 182312466336. Its totient is φ = 13681056000.

The previous prime is 51304139987. The next prime is 51304140001. The reversal of 51304140000 is 4140315.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-2 number, since 2×51304140000² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51304140001) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 37489 + ... + 322511.

Almost surely, 2^51304140000 is an apocalyptic number.

51304140000 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 51304140000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91156233168).

51304140000 is an abundant number, since it is smaller than the sum of its proper divisors (131008326336).

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

51304140000 is a wasteful number, since it uses less digits than its factorization.

51304140000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285059 (or 285033 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 51304140000 its reverse (4140315), we get a palindrome (51308280315).

The spelling of 51304140000 in words is "fifty-one billion, three hundred four million, one hundred forty thousand".