51813084550 has 36 divisors (see below), whose sum is σ = 101711560356. Its totient is φ = 19634425200.

The previous prime is 51813084539. The next prime is 51813084553. The reversal of 51813084550 is 5548031815.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51813084553) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1417216 + ... + 1453315.

It is an arithmetic number, because the mean of its divisors is an integer number (2825321121).

Almost surely, 2^51813084550 is an apocalyptic number.

51813084550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51813084550 is a deficient number, since it is larger than the sum of its proper divisors (49898475806).

51813084550 is a wasteful number, since it uses less digits than its factorization.

51813084550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870581 (or 2870557 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 40.

The spelling of 51813084550 in words is "fifty-one billion, eight hundred thirteen million, eighty-four thousand, five hundred fifty".