7221375 has 72 divisors (see below), whose sum is σ = 15258672. Its totient is φ = 3276000.

The previous prime is 7221373. The next prime is 7221391. The reversal of 7221375 is 5731227.

It is not a de Polignac number, because 7221375 - 2¹ = 7221373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221373) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 55060 + ... + 55190.

It is an arithmetic number, because the mean of its divisors is an integer number (211926).

Almost surely, 2^7221375 is an apocalyptic number.

7221375 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

7221375 is an abundant number, since it is smaller than the sum of its proper divisors (8037297).

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

7221375 is a wasteful number, since it uses less digits than its factorization.

7221375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 146 counting only the distinct ones).

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

The square root of 7221375 is about 2687.2616173346. The cubic root of 7221375 is about 193.2887745771.

The spelling of 7221375 in words is "seven million, two hundred twenty-one thousand, three hundred seventy-five".