7221357 has 48 divisors (see below), whose sum is σ = 12719616. Its totient is φ = 3888000.

The previous prime is 7221353. The next prime is 7221367. The reversal of 7221357 is 7531227.

7221357 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7221357 - 2² = 7221353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7221357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221353) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39807 + ... + 39987.

It is an arithmetic number, because the mean of its divisors is an integer number (264992).

Almost surely, 2^7221357 is an apocalyptic number.

It is an amenable number.

7221357 is a deficient number, since it is larger than the sum of its proper divisors (5498259).

7221357 is a wasteful number, since it uses less digits than its factorization.

7221357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 239 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 7221357 is about 2687.2582681983. The cubic root of 7221357 is about 193.2886139798.

The spelling of 7221357 in words is "seven million, two hundred twenty-one thousand, three hundred fifty-seven".