155011222 has 12 divisors (see below), whose sum is σ = 240262308. Its totient is φ = 75004500.

The previous prime is 155011169. The next prime is 155011243. The reversal of 155011222 is 222110551.

It is a self number, because there is not a number n which added to its sum of digits gives 155011222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38404 + ... + 42247.

It is an arithmetic number, because the mean of its divisors is an integer number (20021859).

Almost surely, 2^155011222 is an apocalyptic number.

155011222 is a deficient number, since it is larger than the sum of its proper divisors (85251086).

155011222 is an equidigital number, since it uses as much as digits as its factorization.

155011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80715 (or 80684 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 155011222 is about 12450.3502761971. The cubic root of 155011222 is about 537.1814988490.

Adding to 155011222 its reverse (222110551), we get a palindrome (377121773).

The spelling of 155011222 in words is "one hundred fifty-five million, eleven thousand, two hundred twenty-two".