7224551 has 2 divisors, whose sum is σ = 7224552. Its totient is φ = 7224550.

The previous prime is 7224521. The next prime is 7224557. The reversal of 7224551 is 1554227.

It is a strong prime.

It is an emirp because it is prime and its reverse (1554227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7224551 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7224551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7224557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3612275 + 3612276.

It is an arithmetic number, because the mean of its divisors is an integer number (3612276).

Almost surely, 2^7224551 is an apocalyptic number.

7224551 is a deficient number, since it is larger than the sum of its proper divisors (1).

7224551 is an equidigital number, since it uses as much as digits as its factorization.

7224551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800, while the sum is 26.

The square root of 7224551 is about 2687.8524885120. The cubic root of 7224551 is about 193.3171069087.

Adding to 7224551 its reverse (1554227), we get a palindrome (8778778).

The spelling of 7224551 in words is "seven million, two hundred twenty-four thousand, five hundred fifty-one".