1220403055 has 8 divisors (see below), whose sum is σ = 1550629872. Its totient is φ = 918891648.

The previous prime is 1220403053. The next prime is 1220403061. The reversal of 1220403055 is 5503040221.

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 1220403055 - 2¹ = 1220403053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220403053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7178757 + ... + 7178926.

It is an arithmetic number, because the mean of its divisors is an integer number (193828734).

Almost surely, 2^1220403055 is an apocalyptic number.

1220403055 is a deficient number, since it is larger than the sum of its proper divisors (330226817).

1220403055 is a wasteful number, since it uses less digits than its factorization.

1220403055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14357705.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1220403055 is about 34934.2676322261. The cubic root of 1220403055 is about 1068.6473882995.

Adding to 1220403055 its reverse (5503040221), we get a palindrome (6723443276).

The spelling of 1220403055 in words is "one billion, two hundred twenty million, four hundred three thousand, fifty-five".