51227721600 has 288 divisors, whose sum is σ = 185469196920. Its totient is φ = 12418560000.

The previous prime is 51227721599. The next prime is 51227721607. The reversal of 51227721600 is 612772215.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51227721607) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1139550 + ... + 1183650.

Almost surely, 2^51227721600 is an apocalyptic number.

51227721600 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 51227721600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92734598460).

51227721600 is an abundant number, since it is smaller than the sum of its proper divisors (134241475320).

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

51227721600 is a wasteful number, since it uses less digits than its factorization.

51227721600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44150 (or 44122 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The spelling of 51227721600 in words is "fifty-one billion, two hundred twenty-seven million, seven hundred twenty-one thousand, six hundred".