1005227609981 has 4 divisors (see below), whose sum is σ = 1148831554272. Its totient is φ = 861623665692.

The previous prime is 1005227609933. The next prime is 1005227609993. The reversal of 1005227609981 is 1899067225001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1005227609981 - 2⁶ = 1005227609917 is a prime.

It is a super-2 number, since 2×1005227609981² (a number of 25 digits) 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 (1005227605981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71801972135 + ... + 71801972148.

It is an arithmetic number, because the mean of its divisors is an integer number (287207888568).

Almost surely, 2^{1005227609981} is an apocalyptic number.

It is an amenable number.

1005227609981 is a deficient number, since it is larger than the sum of its proper divisors (143603944291).

1005227609981 is an equidigital number, since it uses as much as digits as its factorization.

1005227609981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143603944290.

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 1005227609981 in words is "one trillion, five billion, two hundred twenty-seven million, six hundred nine thousand, nine hundred eighty-one".