2221700 has 36 divisors (see below), whose sum is σ = 5194980. Its totient is φ = 819840.

The previous prime is 2221699. The next prime is 2221711. The reversal of 2221700 is 71222.

It can be written as a sum of positive squares in 6 ways, for example, as 521284 + 1700416 = 722^2 + 1304^2 .

It is a super-4 number, since 4×2221700⁴ (a number of 26 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 446 + ... + 2154.

It is an arithmetic number, because the mean of its divisors is an integer number (144305).

2^2221700 is an apocalyptic number.

2221700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2597490).

2221700 is an abundant number, since it is smaller than the sum of its proper divisors (2973280).

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

2221700 is a wasteful number, since it uses less digits than its factorization.

2221700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736 (or 1729 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 2221700 is about 1490.5368160498. The cubic root of 2221700 is about 130.4853650837.

Adding to 2221700 its reverse (71222), we get a palindrome (2292922).

The spelling of 2221700 in words is "two million, two hundred twenty-one thousand, seven hundred".