7356221 has 4 divisors (see below), whose sum is σ = 7414272. Its totient is φ = 7298172.

The previous prime is 7356203. The next prime is 7356247. The reversal of 7356221 is 1226537.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1226537 = 13 ⋅94349.

It is a cyclic number.

It is not a de Polignac number, because 7356221 - 2¹⁴ = 7339837 is a prime.

It is a super-2 number, since 2×7356221² = 108227974801682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7356421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28835 + ... + 29088.

It is an arithmetic number, because the mean of its divisors is an integer number (1853568).

Almost surely, 2^7356221 is an apocalyptic number.

It is an amenable number.

7356221 is a deficient number, since it is larger than the sum of its proper divisors (58051).

7356221 is a wasteful number, since it uses less digits than its factorization.

7356221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58050.

The product of its digits is 2520, while the sum is 26.

The square root of 7356221 is about 2712.2354248848. The cubic root of 7356221 is about 194.4844677582.

The spelling of 7356221 in words is "seven million, three hundred fifty-six thousand, two hundred twenty-one".