1002523221 has 24 divisors (see below), whose sum is σ = 1683015360. Its totient is φ = 563158656.

The previous prime is 1002523189. The next prime is 1002523261. The reversal of 1002523221 is 1223252001.

1002523221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1002523221 - 2⁵ = 1002523189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002523194 and 1002523203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002523261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131140 + ... + 138573.

It is an arithmetic number, because the mean of its divisors is an integer number (70125640).

Almost surely, 2^1002523221 is an apocalyptic number.

It is an amenable number.

1002523221 is a deficient number, since it is larger than the sum of its proper divisors (680492139).

1002523221 is a wasteful number, since it uses less digits than its factorization.

1002523221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269785 (or 269782 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1002523221 is about 31662.6470940128. The cubic root of 1002523221 is about 1000.8403672517.

Adding to 1002523221 its reverse (1223252001), we get a palindrome (2225775222).

The spelling of 1002523221 in words is "one billion, two million, five hundred twenty-three thousand, two hundred twenty-one".