22213730 has 64 divisors (see below), whose sum is σ = 52814592. Its totient is φ = 6512640.

The previous prime is 22213703. The next prime is 22213733. The reversal of 22213730 is 3731222.

It is not an unprimeable number, because it can be changed into a prime (22213733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12242 + ... + 13938.

It is an arithmetic number, because the mean of its divisors is an integer number (825228).

Almost surely, 2^22213730 is an apocalyptic number.

22213730 is an abundant number, since it is smaller than the sum of its proper divisors (30600862).

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

22213730 is a wasteful number, since it uses less digits than its factorization.

22213730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 22213730 is about 4713.1443856517. The cubic root of 22213730 is about 281.1084041162.

Adding to 22213730 its reverse (3731222), we get a palindrome (25944952).

The spelling of 22213730 in words is "twenty-two million, two hundred thirteen thousand, seven hundred thirty".