6720231 has 8 divisors (see below), whose sum is σ = 10240384. Its totient is φ = 3840120.

The previous prime is 6720229. The next prime is 6720239. The reversal of 6720231 is 1320276.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6720231 - 2¹ = 6720229 is a prime.

It is a super-2 number, since 2×6720231² = 90323009386722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 320011 = 6720231 / (6 + 7 + 2 + 0 + 2 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 6720198 and 6720207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720239) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 159985 + ... + 160026.

It is an arithmetic number, because the mean of its divisors is an integer number (1280048).

Almost surely, 2^6720231 is an apocalyptic number.

6720231 is a deficient number, since it is larger than the sum of its proper divisors (3520153).

6720231 is a wasteful number, since it uses less digits than its factorization.

6720231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320021.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 6720231 is about 2592.3408340726. The cubic root of 6720231 is about 188.7099214643.

The spelling of 6720231 in words is "six million, seven hundred twenty thousand, two hundred thirty-one".