1224380155 has 4 divisors (see below), whose sum is σ = 1469256192. Its totient is φ = 979504120.

The previous prime is 1224380149. The next prime is 1224380173. The reversal of 1224380155 is 5510834221.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1224380155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122438011 + ... + 122438020.

It is an arithmetic number, because the mean of its divisors is an integer number (367314048).

Almost surely, 2^1224380155 is an apocalyptic number.

1224380155 is a deficient number, since it is larger than the sum of its proper divisors (244876037).

1224380155 is an equidigital number, since it uses as much as digits as its factorization.

1224380155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244876036.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 1224380155 is about 34991.1439510057. The cubic root of 1224380155 is about 1069.8069803516.

The spelling of 1224380155 in words is "one billion, two hundred twenty-four million, three hundred eighty thousand, one hundred fifty-five".