1005551001051 has 8 divisors (see below), whose sum is σ = 1340940044880. Its totient is φ = 670264645632.

The previous prime is 1005551001047. The next prime is 1005551001061. The reversal of 1005551001051 is 1501001555001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1005551001051 - 2² = 1005551001047 is a prime.

It is a super-2 number, since 2×1005551001051² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1005551001061) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 25649250 + ... + 25688423.

It is an arithmetic number, because the mean of its divisors is an integer number (167617505610).

Almost surely, 2^{1005551001051} is an apocalyptic number.

1005551001051 is a deficient number, since it is larger than the sum of its proper divisors (335389043829).

1005551001051 is an equidigital number, since it uses as much as digits as its factorization.

1005551001051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51344205.

The product of its (nonzero) digits is 625, while the sum is 24.

Adding to 1005551001051 its reverse (1501001555001), we get a palindrome (2506552556052).

The spelling of 1005551001051 in words is "one trillion, five billion, five hundred fifty-one million, one thousand, fifty-one".