7228155 has 32 divisors (see below), whose sum is σ = 12814848. Its totient is φ = 3449600.

The previous prime is 7228153. The next prime is 7228183. The reversal of 7228155 is 5518227.

It is not a de Polignac number, because 7228155 - 2¹ = 7228153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7228153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11407 + ... + 12023.

It is an arithmetic number, because the mean of its divisors is an integer number (400464).

Almost surely, 2^7228155 is an apocalyptic number.

7228155 is a deficient number, since it is larger than the sum of its proper divisors (5586693).

7228155 is a wasteful number, since it uses less digits than its factorization.

7228155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707.

The product of its digits is 5600, while the sum is 30.

The square root of 7228155 is about 2688.5228286180. The cubic root of 7228155 is about 193.3492472698.

The spelling of 7228155 in words is "seven million, two hundred twenty-eight thousand, one hundred fifty-five".