1873221805 has 32 divisors (see below), whose sum is σ = 2795192064. Its totient is φ = 1173436416.

The previous prime is 1873221803. The next prime is 1873221869. The reversal of 1873221805 is 5081223781.

It is a cyclic number.

It is not a de Polignac number, because 1873221805 - 2¹ = 1873221803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1873221803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22914 + ... + 65356.

It is an arithmetic number, because the mean of its divisors is an integer number (87349752).

Almost surely, 2^1873221805 is an apocalyptic number.

It is an amenable number.

1873221805 is a deficient number, since it is larger than the sum of its proper divisors (921970259).

1873221805 is a wasteful number, since it uses less digits than its factorization.

1873221805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42565.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 1873221805 is about 43280.7324914909. The cubic root of 1873221805 is about 1232.7161000061.

The spelling of 1873221805 in words is "one billion, eight hundred seventy-three million, two hundred twenty-one thousand, eight hundred five".