381211 has 4 divisors (see below), whose sum is σ = 391552. Its totient is φ = 370872.

The previous prime is 381209. The next prime is 381221. The reversal of 381211 is 112183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112183 = 17 ⋅6599.

It is a cyclic number.

It is not a de Polignac number, because 381211 - 2¹ = 381209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381221) 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, 5115 + ... + 5188.

It is an arithmetic number, because the mean of its divisors is an integer number (97888).

2³⁸¹²¹¹ is an apocalyptic number.

381211 is a deficient number, since it is larger than the sum of its proper divisors (10341).

381211 is a wasteful number, since it uses less digits than its factorization.

381211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10340.

The product of its digits is 48, while the sum is 16.

The square root of 381211 is about 617.4228696769. The cubic root of 381211 is about 72.5084254972.

Adding to 381211 its reverse (112183), we get a palindrome (493394).

The spelling of 381211 in words is "three hundred eighty-one thousand, two hundred eleven".