7223130 has 48 divisors (see below), whose sum is σ = 19889064. Its totient is φ = 1812480.

The previous prime is 7223123. The next prime is 7223137. The reversal of 7223130 is 313227.

It is an interprime number because it is at equal distance from previous prime (7223123) and next prime (7223137).

It can be written as a sum of positive squares in 4 ways, for example, as 6610041 + 613089 = 2571^2 + 783^2 .

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

It is not an unprimeable number, because it can be changed into a prime (7223137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 831 + ... + 3890.

Almost surely, 2^7223130 is an apocalyptic number.

7223130 is an abundant number, since it is smaller than the sum of its proper divisors (12665934).

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

7223130 is a wasteful number, since it uses less digits than its factorization.

7223130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751 (or 4748 counting only the distinct ones).

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

The square root of 7223130 is about 2687.5881380896. The cubic root of 7223130 is about 193.3044315364.

Adding to 7223130 its reverse (313227), we get a palindrome (7536357).

Subtracting from 7223130 its reverse (313227), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 7223130 in words is "seven million, two hundred twenty-three thousand, one hundred thirty".