7223257 has 6 divisors (see below), whose sum is σ = 7405454. Its totient is φ = 7045440.

The previous prime is 7223243. The next prime is 7223261. The reversal of 7223257 is 7523227.

It can be written as a sum of positive squares in 3 ways, for example, as 168921 + 7054336 = 411^2 + 2656^2 .

It is not a de Polignac number, because 7223257 - 2¹⁵ = 7190489 is a prime.

It is a Duffinian number.

7223257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7223267) 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, 468 + ... + 3829.

Almost surely, 2^7223257 is an apocalyptic number.

It is an amenable number.

7223257 is a deficient number, since it is larger than the sum of its proper divisors (182197).

7223257 is an equidigital number, since it uses as much as digits as its factorization.

7223257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379 (or 4338 counting only the distinct ones).

The product of its digits is 5880, while the sum is 28.

The square root of 7223257 is about 2687.6117651179. The cubic root of 7223257 is about 193.3055644487.

The spelling of 7223257 in words is "seven million, two hundred twenty-three thousand, two hundred fifty-seven".