1000051105550 has 48 divisors (see below), whose sum is σ = 2218250022912. Its totient is φ = 327967068000.

The previous prime is 1000051105519. The next prime is 1000051105597. The reversal of 1000051105550 is 555011500001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 62106926 + ... + 62123025.

It is an arithmetic number, because the mean of its divisors is an integer number (46213542144).

Almost surely, 2^{1000051105550} is an apocalyptic number.

1000051105550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000051105550 is an abundant number, since it is smaller than the sum of its proper divisors (1218198917362).

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

1000051105550 is a wasteful number, since it uses less digits than its factorization.

1000051105550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124229993 (or 124229988 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 23.

Adding to 1000051105550 its reverse (555011500001), we get a palindrome (1555062605551).

The spelling of 1000051105550 in words is "one trillion, fifty-one million, one hundred five thousand, five hundred fifty".