1004222447881 has 3 divisors (see below), whose sum is σ = 1004223449991. Its totient is φ = 1004221445772.

The previous prime is 1004222447873. The next prime is 1004222447927. The reversal of 1004222447881 is 1887442224001.

It is a happy number.

The square root of 1004222447881 is 1002109.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 972016556281 + 32205891600 = 985909^2 + 179460^2 .

It is not a de Polignac number, because 1004222447881 - 2³ = 1004222447873 is a prime.

It is a super-2 number, since 2×1004222447881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1004222447831) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 501055 + ... + 1503163.

It is an arithmetic number, because the mean of its divisors is an integer number (334741149997).

Almost surely, 2^{1004222447881} is an apocalyptic number.

1004222447881 is the 1002109-th square number.

1004222447881 is the 501055-th centered octagonal number.

It is an amenable number.

1004222447881 is a deficient number, since it is larger than the sum of its proper divisors (1002110).

1004222447881 is an frugal number, since it uses more digits than its factorization.

1004222447881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004218 (or 1002109 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 43.

The spelling of 1004222447881 in words is "one trillion, four billion, two hundred twenty-two million, four hundred forty-seven thousand, eight hundred eighty-one".