51504351000 has 128 divisors (see below), whose sum is σ = 161362618560. Its totient is φ = 13677312000.

The previous prime is 51504350941. The next prime is 51504351001. The reversal of 51504351000 is 15340515.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51504351001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 687382 + ... + 758618.

Almost surely, 2^51504351000 is an apocalyptic number.

51504351000 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 51504351000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80681309280).

51504351000 is an abundant number, since it is smaller than the sum of its proper divisors (109858267560).

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

51504351000 is a wasteful number, since it uses less digits than its factorization.

51504351000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71502 (or 71488 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

Adding to 51504351000 its reverse (15340515), we get a palindrome (51519691515).

The spelling of 51504351000 in words is "fifty-one billion, five hundred four million, three hundred fifty-one thousand".