51333223426550 has 192 divisors, whose sum is σ = 104311401143040. Its totient is φ = 18681758983680.

The previous prime is 51333223426519. The next prime is 51333223426553. The reversal of 51333223426550 is 5562432233315.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51333223426553) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11985340709 + ... + 11985344991.

It is an arithmetic number, because the mean of its divisors is an integer number (543288547620).

Almost surely, 2^{51333223426550} is an apocalyptic number.

51333223426550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51333223426550 is an abundant number, since it is smaller than the sum of its proper divisors (52978177716490).

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

51333223426550 is a wasteful number, since it uses less digits than its factorization.

51333223426550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247 (or 5242 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 44.

Adding to 51333223426550 its reverse (5562432233315), we get a palindrome (56895655659865).

The spelling of 51333223426550 in words is "fifty-one trillion, three hundred thirty-three billion, two hundred twenty-three million, four hundred twenty-six thousand, five hundred fifty".