1001055550 has 48 divisors (see below), whose sum is σ = 2044346832. Its totient is φ = 361670400.

The previous prime is 1001055533. The next prime is 1001055551. The reversal of 1001055550 is 555501001.

It is a super-2 number, since 2×1001055550² = 2004224428371605000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001055551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80554 + ... + 92146.

It is an arithmetic number, because the mean of its divisors is an integer number (42590559).

Almost surely, 2^1001055550 is an apocalyptic number.

1001055550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1001055550 is an abundant number, since it is smaller than the sum of its proper divisors (1043291282).

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

1001055550 is a wasteful number, since it uses less digits than its factorization.

1001055550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11773 (or 11768 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 22.

The square root of 1001055550 is about 31639.4619107216. The cubic root of 1001055550 is about 1000.3517262741.

Adding to 1001055550 its reverse (555501001), we get a palindrome (1556556551).

The spelling of 1001055550 in words is "one billion, one million, fifty-five thousand, five hundred fifty".