1002213220 has 24 divisors (see below), whose sum is σ = 2116820664. Its totient is φ = 398566656.

The previous prime is 1002213217. The next prime is 1002213221. The reversal of 1002213220 is 223122001.

It can be written as a sum of positive squares in 4 ways, for example, as 183223296 + 818989924 = 13536^2 + 28618^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1002213220.

It is not an unprimeable number, because it can be changed into a prime (1002213221) 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, 141369 + ... + 148288.

It is an arithmetic number, because the mean of its divisors is an integer number (88200861).

Almost surely, 2^1002213220 is an apocalyptic number.

1002213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002213220 is an abundant number, since it is smaller than the sum of its proper divisors (1114607444).

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

1002213220 is a wasteful number, since it uses less digits than its factorization.

1002213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289839 (or 289837 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1002213220 is about 31657.7513414961. The cubic root of 1002213220 is about 1000.7371964079.

Adding to 1002213220 its reverse (223122001), we get a palindrome (1225335221).

The spelling of 1002213220 in words is "one billion, two million, two hundred thirteen thousand, two hundred twenty".