7231320 has 96 divisors (see below), whose sum is σ = 24008400. Its totient is φ = 1886976.

The previous prime is 7231319. The next prime is 7231333. The reversal of 7231320 is 231327.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 7231293 and 7231302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18891 + ... + 19269.

Almost surely, 2^7231320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7231320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12004200).

7231320 is an abundant number, since it is smaller than the sum of its proper divisors (16777080).

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

7231320 is a wasteful number, since it uses less digits than its factorization.

7231320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 7231320 is about 2689.1113773884. Note that the first 3 decimals coincide. The cubic root of 7231320 is about 193.3774638327.

Adding to 7231320 its reverse (231327), we get a palindrome (7462647).

The spelling of 7231320 in words is "seven million, two hundred thirty-one thousand, three hundred twenty".