3785018221 has 4 divisors (see below), whose sum is σ = 3790058944. Its totient is φ = 3779977500.

The previous prime is 3785018179. The next prime is 3785018231. The reversal of 3785018221 is 1228105873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3785018221 - 2²⁷ = 3650800493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3785018231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2519235 + ... + 2520736.

It is an arithmetic number, because the mean of its divisors is an integer number (947514736).

Almost surely, 2^3785018221 is an apocalyptic number.

It is an amenable number.

3785018221 is a deficient number, since it is larger than the sum of its proper divisors (5040723).

3785018221 is an equidigital number, since it uses as much as digits as its factorization.

3785018221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5040722.

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

The square root of 3785018221 is about 61522.5017452964. The cubic root of 3785018221 is about 1558.4372665490.

The spelling of 3785018221 in words is "three billion, seven hundred eighty-five million, eighteen thousand, two hundred twenty-one".