51504214320 has 240 divisors, whose sum is σ = 188634176640. Its totient is φ = 12517300224.

The previous prime is 51504214313. The next prime is 51504214327. The reversal of 51504214320 is 2341240515.

51504214320 is a `hidden beast` number, since 515 + 0 + 4 + 2 + 143 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (51504214313) and next prime (51504214327).

It is a tau number, because it is divible by the number of its divisors (240).

It is not an unprimeable number, because it can be changed into a prime (51504214327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 704614 + ... + 774266.

It is an arithmetic number, because the mean of its divisors is an integer number (785975736).

Almost surely, 2^51504214320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51504214320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94317088320).

51504214320 is an abundant number, since it is smaller than the sum of its proper divisors (137129962320).

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

51504214320 is a wasteful number, since it uses less digits than its factorization.

51504214320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69764 (or 69755 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 51504214320 its reverse (2341240515), we get a palindrome (53845454835).

The spelling of 51504214320 in words is "fifty-one billion, five hundred four million, two hundred fourteen thousand, three hundred twenty".