7225221131 has 16 divisors (see below), whose sum is σ = 7463280384. Its totient is φ = 6991237344.

The previous prime is 7225221109. The next prime is 7225221163. The reversal of 7225221131 is 1311225227.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7225221131 is a prime.

It is a super-2 number, since 2×7225221131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7225221131.

It is not an unprimeable number, because it can be changed into a prime (7225220131) 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, 3460970 + ... + 3463056.

It is an arithmetic number, because the mean of its divisors is an integer number (466455024).

Almost surely, 2^7225221131 is an apocalyptic number.

7225221131 is a deficient number, since it is larger than the sum of its proper divisors (238059253).

7225221131 is a wasteful number, since it uses less digits than its factorization.

7225221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010.

The product of its digits is 1680, while the sum is 26.

The square root of 7225221131 is about 85001.3007606354. The cubic root of 7225221131 is about 1933.2308392520.

Adding to 7225221131 its reverse (1311225227), we get a palindrome (8536446358).

The spelling of 7225221131 in words is "seven billion, two hundred twenty-five million, two hundred twenty-one thousand, one hundred thirty-one".