7772225 has 6 divisors (see below), whose sum is σ = 9637590. Its totient is φ = 6217760.

The previous prime is 7772221. The next prime is 7772251. The reversal of 7772225 is 5222777.

It can be written as a sum of positive squares in 3 ways, for example, as 66049 + 7706176 = 257^2 + 2776^2 .

It is not a de Polignac number, because 7772225 - 2² = 7772221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7772191 and 7772200.

It is not an unprimeable number, because it can be changed into a prime (7772221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155420 + ... + 155469.

It is an arithmetic number, because the mean of its divisors is an integer number (1606265).

Almost surely, 2^7772225 is an apocalyptic number.

It is an amenable number.

7772225 is a deficient number, since it is larger than the sum of its proper divisors (1865365).

7772225 is a wasteful number, since it uses less digits than its factorization.

7772225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310899 (or 310894 counting only the distinct ones).

The product of its digits is 13720, while the sum is 32.

The square root of 7772225 is about 2787.8710515374. The cubic root of 7772225 is about 198.0835701369.

It can be divided in two parts, 7772 and 225, that added together give a palindrome (7997).

The spelling of 7772225 in words is "seven million, seven hundred seventy-two thousand, two hundred twenty-five".