7222658 has 4 divisors (see below), whose sum is σ = 10833990. Its totient is φ = 3611328.

The previous prime is 7222643. The next prime is 7222661. The reversal of 7222658 is 8562227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8562227 = 163 ⋅52529.

It can be written as a sum of positive squares in only one way, i.e., 5938969 + 1283689 = 2437^2 + 1133^2 .

It is a d-powerful number, because it can be written as 7⁸ + 2¹¹ + 2¹⁴ + 2²⁰ + 6³ + 5⁸ + 8 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1805663 + ... + 1805666.

Almost surely, 2^7222658 is an apocalyptic number.

7222658 is a deficient number, since it is larger than the sum of its proper divisors (3611332).

7222658 is a wasteful number, since it uses less digits than its factorization.

7222658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611331.

The product of its digits is 13440, while the sum is 32.

The square root of 7222658 is about 2687.5003255814. The cubic root of 7222658 is about 193.3002209112.

The spelling of 7222658 in words is "seven million, two hundred twenty-two thousand, six hundred fifty-eight".