51554334140 has 48 divisors (see below), whose sum is σ = 112330108800. Its totient is φ = 19851482112.

The previous prime is 51554334077. The next prime is 51554334163. The reversal of 51554334140 is 4143345515.

It is a super-3 number, since 3×51554334140³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51554334140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63581 + ... + 327339.

It is an arithmetic number, because the mean of its divisors is an integer number (2340210600).

Almost surely, 2^51554334140 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 51554334140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56165054400).

51554334140 is an abundant number, since it is smaller than the sum of its proper divisors (60775774660).

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

51554334140 is a wasteful number, since it uses less digits than its factorization.

51554334140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264134 (or 264132 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 51554334140 its reverse (4143345515), we get a palindrome (55697679655).

The spelling of 51554334140 in words is "fifty-one billion, five hundred fifty-four million, three hundred thirty-four thousand, one hundred forty".