1001223144 has 48 divisors (see below), whose sum is σ = 2805156900. Its totient is φ = 322232064.

The previous prime is 1001223133. The next prime is 1001223149. The reversal of 1001223144 is 4413221001.

It can be written as a sum of positive squares in 2 ways, for example, as 1000963044 + 260100 = 31638^2 + 510^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1001223149) 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 11 ways as a sum of consecutive naturals, for example, 237669 + ... + 241844.

Almost surely, 2^1001223144 is an apocalyptic number.

It is an amenable number.

1001223144 is an abundant number, since it is smaller than the sum of its proper divisors (1803933756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001223144 is a wasteful number, since it uses less digits than its factorization.

1001223144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479554 (or 479547 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1001223144 is about 31642.1102962492. The cubic root of 1001223144 is about 1000.4075485483.

Adding to 1001223144 its reverse (4413221001), we get a palindrome (5414444145).

The spelling of 1001223144 in words is "one billion, one million, two hundred twenty-three thousand, one hundred forty-four".