2213730 has 48 divisors (see below), whose sum is σ = 5975424. Its totient is φ = 589680.

The previous prime is 2213711. The next prime is 2213759. The reversal of 2213730 is 373122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1975 + ... + 2885.

It is an arithmetic number, because the mean of its divisors is an integer number (124488).

2^2213730 is an apocalyptic number.

2213730 is the 1215-th pentagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2213730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2987712).

2213730 is an abundant number, since it is smaller than the sum of its proper divisors (3761694).

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

2213730 is an equidigital number, since it uses as much as digits as its factorization.

2213730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 921 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 2213730 is about 1487.8608805933. The cubic root of 2213730 is about 130.3291462095.

Adding to 2213730 its reverse (373122), we get a palindrome (2586852).

The spelling of 2213730 in words is "two million, two hundred thirteen thousand, seven hundred thirty".