381867211 has 4 divisors (see below), whose sum is σ = 416582424. Its totient is φ = 347152000.

The previous prime is 381867203. The next prime is 381867253. The reversal of 381867211 is 112768183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112768183 = 11 ⋅10251653.

It is a cyclic number.

It is not a de Polignac number, because 381867211 - 2³ = 381867203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381867011) 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, 17357590 + ... + 17357611.

It is an arithmetic number, because the mean of its divisors is an integer number (104145606).

Almost surely, 2^381867211 is an apocalyptic number.

381867211 is a deficient number, since it is larger than the sum of its proper divisors (34715213).

381867211 is a wasteful number, since it uses less digits than its factorization.

381867211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34715212.

The product of its digits is 16128, while the sum is 37.

The square root of 381867211 is about 19541.4229522827. The cubic root of 381867211 is about 725.5000662582.

The spelling of 381867211 in words is "three hundred eighty-one million, eight hundred sixty-seven thousand, two hundred eleven".