1001005550 has 24 divisors (see below), whose sum is σ = 1869618432. Its totient is φ = 398736000.

The previous prime is 1001005549. The next prime is 1001005559. The reversal of 1001005550 is 555001001.

It is a super-2 number, since 2×1001005550² = 2004024222261605000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001005559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29486 + ... + 53585.

It is an arithmetic number, because the mean of its divisors is an integer number (77900768).

Almost surely, 2^1001005550 is an apocalyptic number.

1001005550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1001005550 is a deficient number, since it is larger than the sum of its proper divisors (868612882).

1001005550 is a wasteful number, since it uses less digits than its factorization.

1001005550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83324 (or 83319 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 1001005550 is about 31638.6717483525. The cubic root of 1001005550 is about 1000.3350710482.

Adding to 1001005550 its reverse (555001001), we get a palindrome (1556006551).

The spelling of 1001005550 in words is "one billion, one million, five thousand, five hundred fifty".