1220535355 has 16 divisors (see below), whose sum is σ = 1615781664. Its totient is φ = 879333120.

The previous prime is 1220535353. The next prime is 1220535389. The reversal of 1220535355 is 5535350221.

It is not a de Polignac number, because 1220535355 - 2¹ = 1220535353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220535353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226329 + ... + 231658.

It is an arithmetic number, because the mean of its divisors is an integer number (100986354).

Almost surely, 2^1220535355 is an apocalyptic number.

1220535355 is a deficient number, since it is larger than the sum of its proper divisors (395246309).

1220535355 is a wasteful number, since it uses less digits than its factorization.

1220535355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458046.

The product of its (nonzero) digits is 22500, while the sum is 31.

The square root of 1220535355 is about 34936.1611371370. The cubic root of 1220535355 is about 1068.6860031216.

Adding to 1220535355 its reverse (5535350221), we get a palindrome (6755885576).

The spelling of 1220535355 in words is "one billion, two hundred twenty million, five hundred thirty-five thousand, three hundred fifty-five".