1224322155 has 128 divisors (see below), whose sum is σ = 2574120960. Its totient is φ = 540587520.

The previous prime is 1224322139. The next prime is 1224322159. The reversal of 1224322155 is 5512234221.

1224322155 is a `hidden beast` number, since 12 + 2 + 432 + 215 + 5 = 666.

It is not a de Polignac number, because 1224322155 - 2⁴ = 1224322139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1224322159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3862057 + ... + 3862373.

It is an arithmetic number, because the mean of its divisors is an integer number (20110320).

Almost surely, 2^1224322155 is an apocalyptic number.

1224322155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1224322155 is an abundant number, since it is smaller than the sum of its proper divisors (1349798805).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1224322155 is a wasteful number, since it uses less digits than its factorization.

1224322155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 460 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1224322155 is about 34990.3151600554. The cubic root of 1224322155 is about 1069.7900875087.

Adding to 1224322155 its reverse (5512234221), we get a palindrome (6736556376).

The spelling of 1224322155 in words is "one billion, two hundred twenty-four million, three hundred twenty-two thousand, one hundred fifty-five".