7311681 has 32 divisors (see below), whose sum is σ = 12001920. Its totient is φ = 4370112.

The previous prime is 7311679. The next prime is 7311701. The reversal of 7311681 is 1861137.

It is not a de Polignac number, because 7311681 - 2¹ = 7311679 is a prime.

It is a super-2 number, since 2×7311681² = 106921358091522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (7312681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12706 + ... + 13268.

It is an arithmetic number, because the mean of its divisors is an integer number (375060).

Almost surely, 2^7311681 is an apocalyptic number.

It is an amenable number.

7311681 is a deficient number, since it is larger than the sum of its proper divisors (4690239).

7311681 is a wasteful number, since it uses less digits than its factorization.

7311681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 616 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 7311681 is about 2704.0120192041. The cubic root of 7311681 is about 194.0911553055.

The spelling of 7311681 in words is "seven million, three hundred eleven thousand, six hundred eighty-one".