2173855801 has 8 divisors (see below), whose sum is σ = 2344542984. Its totient is φ = 2003664000.

The previous prime is 2173855799. The next prime is 2173855829. The reversal of 2173855801 is 1085583712.

It can be written as a sum of positive squares in 4 ways, for example, as 114511401 + 2059344400 = 10701^2 + 45380^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2173855801 - 2¹ = 2173855799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2173855861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114700 + ... + 132301.

It is an arithmetic number, because the mean of its divisors is an integer number (293067873).

Almost surely, 2^2173855801 is an apocalyptic number.

It is an amenable number.

2173855801 is a deficient number, since it is larger than the sum of its proper divisors (170687183).

2173855801 is a wasteful number, since it uses less digits than its factorization.

2173855801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247691.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 2173855801 is about 46624.6265507832. The cubic root of 2173855801 is about 1295.4189450666.

The spelling of 2173855801 in words is "two billion, one hundred seventy-three million, eight hundred fifty-five thousand, eight hundred one".