7281222 has 32 divisors (see below), whose sum is σ = 15785952. Its totient is φ = 2225664.

The previous prime is 7281203. The next prime is 7281223. The reversal of 7281222 is 2221827.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7281192 and 7281201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7281223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21438 + ... + 21774.

It is an arithmetic number, because the mean of its divisors is an integer number (493311).

Almost surely, 2^7281222 is an apocalyptic number.

7281222 is an abundant number, since it is smaller than the sum of its proper divisors (8504730).

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

7281222 is a wasteful number, since it uses less digits than its factorization.

7281222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632.

The product of its digits is 896, while the sum is 24.

The square root of 7281222 is about 2698.3739548106. The cubic root of 7281222 is about 193.8212652165.

It can be divided in two parts, 7281 and 222, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 7281222 in words is "seven million, two hundred eighty-one thousand, two hundred twenty-two".