1001223533 has 8 divisors (see below), whose sum is σ = 1017693600. Its totient is φ = 984886128.

The previous prime is 1001223499. The next prime is 1001223539. The reversal of 1001223533 is 3353221001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001223533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001223539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17891 + ... + 48192.

It is an arithmetic number, because the mean of its divisors is an integer number (127211700).

Almost surely, 2^1001223533 is an apocalyptic number.

It is an amenable number.

1001223533 is a deficient number, since it is larger than the sum of its proper divisors (16470067).

1001223533 is a wasteful number, since it uses less digits than its factorization.

1001223533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66331.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 1001223533 is about 31642.1164431206. The cubic root of 1001223533 is about 1000.4076781093.

Adding to 1001223533 its reverse (3353221001), we get a palindrome (4354444534).

The spelling of 1001223533 in words is "one billion, one million, two hundred twenty-three thousand, five hundred thirty-three".