72226225 has 6 divisors (see below), whose sum is σ = 89560550. Its totient is φ = 57780960.

The previous prime is 72226223. The next prime is 72226229. The reversal of 72226225 is 52262227.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 8976016 + 63250209 = 2996^2 + 7953^2 .

It is not a de Polignac number, because 72226225 - 2¹ = 72226223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72226193 and 72226202.

It is not an unprimeable number, because it can be changed into a prime (72226223) 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, 1444500 + ... + 1444549.

Almost surely, 2^72226225 is an apocalyptic number.

It is an amenable number.

72226225 is a deficient number, since it is larger than the sum of its proper divisors (17334325).

72226225 is a wasteful number, since it uses less digits than its factorization.

72226225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889059 (or 2889054 counting only the distinct ones).

The product of its digits is 6720, while the sum is 28.

The square root of 72226225 is about 8498.6013555173. The cubic root of 72226225 is about 416.4520192203.

The spelling of 72226225 in words is "seventy-two million, two hundred twenty-six thousand, two hundred twenty-five".