7220681 has 16 divisors (see below), whose sum is σ = 8164800. Its totient is φ = 6339648.

The previous prime is 7220677. The next prime is 7220693. The reversal of 7220681 is 1860227.

It is a cyclic number.

It is not a de Polignac number, because 7220681 - 2² = 7220677 is a prime.

It is a super-2 number, since 2×7220681² = 104276468207522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7220681.

It is not an unprimeable number, because it can be changed into a prime (7220611) 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 15 ways as a sum of consecutive naturals, for example, 40250 + ... + 40428.

It is an arithmetic number, because the mean of its divisors is an integer number (510300).

Almost surely, 2^7220681 is an apocalyptic number.

It is an amenable number.

7220681 is a deficient number, since it is larger than the sum of its proper divisors (944119).

7220681 is a wasteful number, since it uses less digits than its factorization.

7220681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 7220681 is about 2687.1324864993. The cubic root of 7220681 is about 193.2825824643.

The spelling of 7220681 in words is "seven million, two hundred twenty thousand, six hundred eighty-one".