2221323500 has 48 divisors (see below), whose sum is σ = 5292417312. Its totient is φ = 807752000.

The previous prime is 2221323493. The next prime is 2221323551. The reversal of 2221323500 is 53231222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196439 + ... + 207438.

It is an arithmetic number, because the mean of its divisors is an integer number (110258694).

Almost surely, 2^2221323500 is an apocalyptic number.

2221323500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221323500 is an abundant number, since it is smaller than the sum of its proper divisors (3071093812).

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

2221323500 is a wasteful number, since it uses less digits than its factorization.

2221323500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403907 (or 403895 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2221323500 is about 47130.9187264581. The cubic root of 2221323500 is about 1304.7799377416.

Adding to 2221323500 its reverse (53231222), we get a palindrome (2274554722).

The spelling of 2221323500 in words is "two billion, two hundred twenty-one million, three hundred twenty-three thousand, five hundred".