1220555235 has 16 divisors (see below), whose sum is σ = 1953768960. Its totient is φ = 650669280.

The previous prime is 1220555213. The next prime is 1220555251. The reversal of 1220555235 is 5325550221.

It is not a de Polignac number, because 1220555235 - 2¹⁵ = 1220522467 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18406 + ... + 52724.

It is an arithmetic number, because the mean of its divisors is an integer number (122110560).

Almost surely, 2^1220555235 is an apocalyptic number.

1220555235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1220555235 is a deficient number, since it is larger than the sum of its proper divisors (733213725).

1220555235 is a wasteful number, since it uses less digits than its factorization.

1220555235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36698.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 1220555235 is about 34936.4456549318. The cubic root of 1220555235 is about 1068.6918053194.

The spelling of 1220555235 in words is "one billion, two hundred twenty million, five hundred fifty-five thousand, two hundred thirty-five".