51553501500 has 96 divisors (see below), whose sum is σ = 151204435200. Its totient is φ = 13648641600.

The previous prime is 51553501471. The next prime is 51553501507. The reversal of 51553501500 is 510535515.

It is a super-3 number, since 3×51553501500³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51553501507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84871 + ... + 332129.

It is an arithmetic number, because the mean of its divisors is an integer number (1575046200).

Almost surely, 2^51553501500 is an apocalyptic number.

51553501500 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 51553501500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75602217600).

51553501500 is an abundant number, since it is smaller than the sum of its proper divisors (99650933700).

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

51553501500 is a wasteful number, since it uses less digits than its factorization.

51553501500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247420 (or 247408 counting only the distinct ones).

The product of its (nonzero) digits is 9375, while the sum is 30.

The spelling of 51553501500 in words is "fifty-one billion, five hundred fifty-three million, five hundred one thousand, five hundred".