1220451055 has 8 divisors (see below), whose sum is σ = 1467173952. Its totient is φ = 974605728.

The previous prime is 1220451053. The next prime is 1220451083. The reversal of 1220451055 is 5501540221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220451055 - 2¹ = 1220451053 is a prime.

It is a super-2 number, since 2×1220451055² = 2979001555301226050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220451053) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 216327 + ... + 221896.

It is an arithmetic number, because the mean of its divisors is an integer number (183396744).

Almost surely, 2^1220451055 is an apocalyptic number.

1220451055 is a deficient number, since it is larger than the sum of its proper divisors (246722897).

1220451055 is an equidigital number, since it uses as much as digits as its factorization.

1220451055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438785.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1220451055 is about 34934.9546299977. The cubic root of 1220451055 is about 1068.6613985348.

Adding to 1220451055 its reverse (5501540221), we get a palindrome (6721991276).

The spelling of 1220451055 in words is "one billion, two hundred twenty million, four hundred fifty-one thousand, fifty-five".