3885387220217 has 4 divisors (see below), whose sum is σ = 3885419178996. Its totient is φ = 3885355261440.

The previous prime is 3885387220201. The next prime is 3885387220249. The reversal of 3885387220217 is 7120227835883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2744376571456 + 1141010648761 = 1656616^2 + 1068181^2 .

It is a cyclic number.

It is not a de Polignac number, because 3885387220217 - 2⁴ = 3885387220201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3885387220277) 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, 15796328 + ... + 16040409.

It is an arithmetic number, because the mean of its divisors is an integer number (971354794749).

Almost surely, 2^{3885387220217} is an apocalyptic number.

It is an amenable number.

3885387220217 is a deficient number, since it is larger than the sum of its proper divisors (31958779).

3885387220217 is a wasteful number, since it uses less digits than its factorization.

3885387220217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31958778.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 3885387220217 in words is "three trillion, eight hundred eighty-five billion, three hundred eighty-seven million, two hundred twenty thousand, two hundred seventeen".