7140222 has 12 divisors (see below), whose sum is σ = 15470520. Its totient is φ = 2380068.

The previous prime is 7140209. The next prime is 7140227. The reversal of 7140222 is 2220417.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 396679 = 7140222 / (7 + 1 + 4 + 0 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 7140195 and 7140204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7140227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198322 + ... + 198357.

It is an arithmetic number, because the mean of its divisors is an integer number (1289210).

Almost surely, 2^7140222 is an apocalyptic number.

7140222 is an abundant number, since it is smaller than the sum of its proper divisors (8330298).

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

7140222 is a wasteful number, since it uses less digits than its factorization.

7140222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396687 (or 396684 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 7140222 is about 2672.1193835605. The cubic root of 7140222 is about 192.5619927396.

Adding to 7140222 its reverse (2220417), we get a palindrome (9360639).

The spelling of 7140222 in words is "seven million, one hundred forty thousand, two hundred twenty-two".