1000213220 has 12 divisors (see below), whose sum is σ = 2100447804. Its totient is φ = 400085280.

The previous prime is 1000213199. The next prime is 1000213237. The reversal of 1000213220 is 223120001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 292546816 + 707666404 = 17104^2 + 26602^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25005311 + ... + 25005350.

It is an arithmetic number, because the mean of its divisors is an integer number (175037317).

Almost surely, 2^1000213220 is an apocalyptic number.

1000213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000213220 is an abundant number, since it is smaller than the sum of its proper divisors (1100234584).

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

1000213220 is a wasteful number, since it uses less digits than its factorization.

1000213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50010670 (or 50010668 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1000213220 is about 31626.1477262091. The cubic root of 1000213220 is about 1000.0710682825.

Adding to 1000213220 its reverse (223120001), we get a palindrome (1223333221).

The spelling of 1000213220 in words is "one billion, two hundred thirteen thousand, two hundred twenty".