7219225 has 24 divisors (see below), whose sum is σ = 9782360. Its totient is φ = 5253120.

The previous prime is 7219213. The next prime is 7219241. The reversal of 7219225 is 5229127.

7219225 = T₁₇₀ + T₁₇₁ + ... + T₃₆₃.

7219225 = 24³ + 25³ + ... + 73³.

It can be written as a sum of positive squares in 12 ways, for example, as 1630729 + 5588496 = 1277^2 + 2364^2 .

It is not a de Polignac number, because 7219225 - 2⁹ = 7218713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7219193 and 7219202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31411 + ... + 31639.

Almost surely, 2^7219225 is an apocalyptic number.

It is an amenable number.

7219225 is a deficient number, since it is larger than the sum of its proper divisors (2563135).

7219225 is a wasteful number, since it uses less digits than its factorization.

7219225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 344 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 7219225 is about 2686.8615520715. The cubic root of 7219225 is about 193.2695902291.

The spelling of 7219225 in words is "seven million, two hundred nineteen thousand, two hundred twenty-five".