7225777 has 4 divisors (see below), whose sum is σ = 7781620. Its totient is φ = 6669936.

The previous prime is 7225747. The next prime is 7225781. The reversal of 7225777 is 7775227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7775227 = 251 ⋅30977.

It can be written as a sum of positive squares in 2 ways, for example, as 1838736 + 5387041 = 1356^2 + 2321^2 .

It is not a de Polignac number, because 7225777 - 2¹¹ = 7223729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7225747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277902 + ... + 277927.

It is an arithmetic number, because the mean of its divisors is an integer number (1945405).

Almost surely, 2^7225777 is an apocalyptic number.

It is an amenable number.

7225777 is a deficient number, since it is larger than the sum of its proper divisors (555843).

7225777 is a wasteful number, since it uses less digits than its factorization.

7225777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555842.

The product of its digits is 48020, while the sum is 37.

The square root of 7225777 is about 2688.0805419481. The cubic root of 7225777 is about 193.3280415383.

The spelling of 7225777 in words is "seven million, two hundred twenty-five thousand, seven hundred seventy-seven".