72222225 has 12 divisors (see below), whose sum is σ = 119407536. Its totient is φ = 38518480.

The previous prime is 72222193. The next prime is 72222229. The reversal of 72222225 is 52222227.

It is not a de Polignac number, because 72222225 - 2⁵ = 72222193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72222195 and 72222204.

It is not an unprimeable number, because it can be changed into a prime (72222229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 481407 + ... + 481556.

It is an arithmetic number, because the mean of its divisors is an integer number (9950628).

Almost surely, 2^72222225 is an apocalyptic number.

72222225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72222225 is a deficient number, since it is larger than the sum of its proper divisors (47185311).

72222225 is a wasteful number, since it uses less digits than its factorization.

72222225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962976 (or 962971 counting only the distinct ones).

The product of its digits is 2240, while the sum is 24.

The square root of 72222225 is about 8498.3660194181. The cubic root of 72222225 is about 416.4443311595. Note that the first 3 decimals are identical.

It can be divided in two parts, 7222222 and 5, that added together give a palindrome (7222227).

The spelling of 72222225 in words is "seventy-two million, two hundred twenty-two thousand, two hundred twenty-five".