381621205 has 8 divisors (see below), whose sum is σ = 523366272. Its totient is φ = 261683088.

The previous prime is 381621203. The next prime is 381621281. The reversal of 381621205 is 502126183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381621205 - 2¹ = 381621203 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 (381621203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5451697 + ... + 5451766.

It is an arithmetic number, because the mean of its divisors is an integer number (65420784).

Almost surely, 2^381621205 is an apocalyptic number.

381621205 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

381621205 is a deficient number, since it is larger than the sum of its proper divisors (141745067).

381621205 is a wasteful number, since it uses less digits than its factorization.

381621205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10903475.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 381621205 is about 19535.1274631112. The cubic root of 381621205 is about 725.3442392202.

Adding to 381621205 its reverse (502126183), we get a palindrome (883747388).

The spelling of 381621205 in words is "three hundred eighty-one million, six hundred twenty-one thousand, two hundred five".