7224681 has 4 divisors (see below), whose sum is σ = 9632912. Its totient is φ = 4816452.

The previous prime is 7224673. The next prime is 7224689. The reversal of 7224681 is 1864227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (7224673) and next prime (7224689).

It is not a de Polignac number, because 7224681 - 2³ = 7224673 is a prime.

It is a super-2 number, since 2×7224681² = 104392031103522, which contains 22 as substring.

It is a Duffinian number.

7224681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7224689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204111 + ... + 1204116.

It is an arithmetic number, because the mean of its divisors is an integer number (2408228).

Almost surely, 2^7224681 is an apocalyptic number.

It is an amenable number.

7224681 is a deficient number, since it is larger than the sum of its proper divisors (2408231).

7224681 is a wasteful number, since it uses less digits than its factorization.

7224681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408230.

The product of its digits is 5376, while the sum is 30.

The square root of 7224681 is about 2687.8766712779. The cubic root of 7224681 is about 193.3182664305.

It can be divided in two parts, 72246 and 81, that added together give a palindrome (72327).

The spelling of 7224681 in words is "seven million, two hundred twenty-four thousand, six hundred eighty-one".