7181131 has 2 divisors, whose sum is σ = 7181132. Its totient is φ = 7181130.

The previous prime is 7181113. The next prime is 7181147. The reversal of 7181131 is 1311817.

Together with previous prime (7181113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7181131 - 2⁵ = 7181099 is a prime.

It is a super-2 number, since 2×7181131² = 103137284878322, which contains 22 as substring.

7181131 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7181171) 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 as a sum of consecutive naturals, namely, 3590565 + 3590566.

It is an arithmetic number, because the mean of its divisors is an integer number (3590566).

Almost surely, 2^7181131 is an apocalyptic number.

7181131 is a deficient number, since it is larger than the sum of its proper divisors (1).

7181131 is an equidigital number, since it uses as much as digits as its factorization.

7181131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 22.

The square root of 7181131 is about 2679.7632358102. The cubic root of 7181131 is about 192.9290458391.

Adding to 7181131 its reverse (1311817), we get a palindrome (8492948).

It can be divided in two parts, 718 and 1131, that added together give a square (1849 = 43²).

The spelling of 7181131 in words is "seven million, one hundred eighty-one thousand, one hundred thirty-one".