381838201 has 4 divisors (see below), whose sum is σ = 385545472. Its totient is φ = 378130932.

The previous prime is 381838189. The next prime is 381838211. The reversal of 381838201 is 102838183.

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 381838201 - 2¹⁵ = 381805433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381838211) 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, 1853481 + ... + 1853686.

It is an arithmetic number, because the mean of its divisors is an integer number (96386368).

Almost surely, 2^381838201 is an apocalyptic number.

It is an amenable number.

381838201 is a deficient number, since it is larger than the sum of its proper divisors (3707271).

381838201 is a wasteful number, since it uses less digits than its factorization.

381838201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707270.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 381838201 is about 19540.6806687996. The cubic root of 381838201 is about 725.4816939992.

The spelling of 381838201 in words is "three hundred eighty-one million, eight hundred thirty-eight thousand, two hundred one".