1820355255 has 16 divisors (see below), whose sum is σ = 3236187360. Its totient is φ = 970856064.

The previous prime is 1820355241. The next prime is 1820355281. The reversal of 1820355255 is 5525530281.

It is not a de Polignac number, because 1820355255 - 2⁷ = 1820355127 is a prime.

It is a super-2 number, since 2×1820355255² = 6627386508812230050, which contains 22 as substring.

It is a congruent number.

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, 6741922 + ... + 6742191.

It is an arithmetic number, because the mean of its divisors is an integer number (202261710).

Almost surely, 2^1820355255 is an apocalyptic number.

1820355255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1820355255 is a deficient number, since it is larger than the sum of its proper divisors (1415832105).

1820355255 is a wasteful number, since it uses less digits than its factorization.

1820355255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13484127 (or 13484121 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The square root of 1820355255 is about 42665.6214650625. The cubic root of 1820355255 is about 1221.0085843561.

The spelling of 1820355255 in words is "one billion, eight hundred twenty million, three hundred fifty-five thousand, two hundred fifty-five".