2321205538 has 16 divisors (see below), whose sum is σ = 3631186944. Its totient is φ = 1111582080.

The previous prime is 2321205511. The next prime is 2321205541. The reversal of 2321205538 is 8355021232.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186970 + ... + 198997.

It is an arithmetic number, because the mean of its divisors is an integer number (226949184).

Almost surely, 2^2321205538 is an apocalyptic number.

2321205538 is a deficient number, since it is larger than the sum of its proper divisors (1309981406).

2321205538 is a wasteful number, since it uses less digits than its factorization.

2321205538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386097.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2321205538 is about 48178.8910001050. The cubic root of 2321205538 is about 1324.0504482836.

The spelling of 2321205538 in words is "two billion, three hundred twenty-one million, two hundred five thousand, five hundred thirty-eight".