155222224 has 20 divisors (see below), whose sum is σ = 303408036. Its totient is φ = 76923392.

The previous prime is 155222173. The next prime is 155222237. The reversal of 155222224 is 422222551.

155222224 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 86862400 + 68359824 = 9320^2 + 8268^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41119 + ... + 44734.

Almost surely, 2^155222224 is an apocalyptic number.

It is an amenable number.

155222224 is a deficient number, since it is larger than the sum of its proper divisors (148185812).

155222224 is a wasteful number, since it uses less digits than its factorization.

155222224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85974 (or 85968 counting only the distinct ones).

The product of its digits is 3200, while the sum is 25.

The square root of 155222224 is about 12458.8211320333. The cubic root of 155222224 is about 537.4251263292.

Adding to 155222224 its reverse (422222551), we get a palindrome (577444775).

The spelling of 155222224 in words is "one hundred fifty-five million, two hundred twenty-two thousand, two hundred twenty-four".