1001116551 has 4 divisors (see below), whose sum is σ = 1334822072. Its totient is φ = 667411032.

The previous prime is 1001116549. The next prime is 1001116579. The reversal of 1001116551 is 1556111001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1001116551 - 2¹ = 1001116549 is a prime.

It is a super-2 number, since 2×1001116551² = 2004468697372271202, 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 (1001114551) 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 3 ways as a sum of consecutive naturals, for example, 166852756 + ... + 166852761.

It is an arithmetic number, because the mean of its divisors is an integer number (333705518).

Almost surely, 2^1001116551 is an apocalyptic number.

1001116551 is a deficient number, since it is larger than the sum of its proper divisors (333705521).

1001116551 is an equidigital number, since it uses as much as digits as its factorization.

1001116551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333705520.

The product of its (nonzero) digits is 150, while the sum is 21.

The square root of 1001116551 is about 31640.4258978921. The cubic root of 1001116551 is about 1000.3720452318.

Adding to 1001116551 its reverse (1556111001), we get a palindrome (2557227552).

It can be divided in two parts, 10011 and 16551, that added together give a palindrome (26562).

The spelling of 1001116551 in words is "one billion, one million, one hundred sixteen thousand, five hundred fifty-one".