1005500551 has 16 divisors (see below), whose sum is σ = 1120327200. Its totient is φ = 894784000.

The previous prime is 1005500477. The next prime is 1005500599. The reversal of 1005500551 is 1550055001.

It is not a de Polignac number, because 1005500551 - 2¹¹ = 1005498503 is a prime.

It is a super-2 number, since 2×1005500551² = 2022062716122607202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005530551) 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 15 ways as a sum of consecutive naturals, for example, 93795 + ... + 103963.

It is an arithmetic number, because the mean of its divisors is an integer number (70020450).

Almost surely, 2^1005500551 is an apocalyptic number.

1005500551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1005500551 is a deficient number, since it is larger than the sum of its proper divisors (114826649).

1005500551 is a wasteful number, since it uses less digits than its factorization.

1005500551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10370.

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

The square root of 1005500551 is about 31709.6286796298. The cubic root of 1005500551 is about 1001.8301654510.

Multiplying 1005500551 by its sum of digits (22), we get a palindrome (22121012122).

Adding to 1005500551 its reverse (1550055001), we get a palindrome (2555555552).

The spelling of 1005500551 in words is "one billion, five million, five hundred thousand, five hundred fifty-one".