7220131 has 2 divisors, whose sum is σ = 7220132. Its totient is φ = 7220130.

The previous prime is 7220123. The next prime is 7220149. The reversal of 7220131 is 1310227.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7220131 - 2³ = 7220123 is a prime.

It is a super-2 number, since 2×7220131² = 104260583314322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7220111) 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, 3610065 + 3610066.

It is an arithmetic number, because the mean of its divisors is an integer number (3610066).

Almost surely, 2^7220131 is an apocalyptic number.

7220131 is a deficient number, since it is larger than the sum of its proper divisors (1).

7220131 is an equidigital number, since it uses as much as digits as its factorization.

7220131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 7220131 is about 2687.0301449742. The cubic root of 7220131 is about 193.2776748884.

Adding to 7220131 its reverse (1310227), we get a palindrome (8530358).

The spelling of 7220131 in words is "seven million, two hundred twenty thousand, one hundred thirty-one".