1220155255 has 16 divisors (see below), whose sum is σ = 1600884000. Its totient is φ = 885391360.

The previous prime is 1220155249. The next prime is 1220155259. The reversal of 1220155255 is 5525510221.

1220155255 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-1220155255 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220155259) 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 15 ways as a sum of consecutive naturals, for example, 10 + ... + 49399.

It is an arithmetic number, because the mean of its divisors is an integer number (100055250).

Almost surely, 2^1220155255 is an apocalyptic number.

1220155255 is a deficient number, since it is larger than the sum of its proper divisors (380728745).

1220155255 is a wasteful number, since it uses less digits than its factorization.

1220155255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49874.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 1220155255 is about 34930.7207913035. The cubic root of 1220155255 is about 1068.5750546152.

Adding to 1220155255 its reverse (5525510221), we get a palindrome (6745665476).

The spelling of 1220155255 in words is "one billion, two hundred twenty million, one hundred fifty-five thousand, two hundred fifty-five".