1821262055 has 24 divisors (see below), whose sum is σ = 2265078816. Its totient is φ = 1405322880.

The previous prime is 1821262049. The next prime is 1821262073. The reversal of 1821262055 is 5502621281.

It is not a de Polignac number, because 1821262055 - 2⁴ = 1821262039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 985142 + ... + 986988.

It is an arithmetic number, because the mean of its divisors is an integer number (94378284).

Almost surely, 2^1821262055 is an apocalyptic number.

1821262055 is a deficient number, since it is larger than the sum of its proper divisors (443816761).

1821262055 is an equidigital number, since it uses as much as digits as its factorization.

1821262055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027 (or 1966 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 1821262055 is about 42676.2469647930. The cubic root of 1821262055 is about 1221.2112969460.

The spelling of 1821262055 in words is "one billion, eight hundred twenty-one million, two hundred sixty-two thousand, fifty-five".