51344555220 has 288 divisors, whose sum is σ = 181884358656. Its totient is φ = 11481523200.

The previous prime is 51344555147. The next prime is 51344555237. The reversal of 51344555220 is 2255544315.

51344555220 is a `hidden beast` number, since 5 + 134 + 455 + 52 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15139725 + ... + 15143115.

It is an arithmetic number, because the mean of its divisors is an integer number (631542912).

Almost surely, 2^51344555220 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 51344555220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90942179328).

51344555220 is an abundant number, since it is smaller than the sum of its proper divisors (130539803436).

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

51344555220 is a wasteful number, since it uses less digits than its factorization.

51344555220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671 (or 3666 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 51344555220 in words is "fifty-one billion, three hundred forty-four million, five hundred fifty-five thousand, two hundred twenty".