381077221 has 8 divisors (see below), whose sum is σ = 435681344. Its totient is φ = 326514240.

The previous prime is 381077209. The next prime is 381077233. The reversal of 381077221 is 122770183.

It is an interprime number because it is at equal distance from previous prime (381077209) and next prime (381077233).

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 381077221 - 2¹⁹ = 380552933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381077201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13126 + ... + 30568.

It is an arithmetic number, because the mean of its divisors is an integer number (54460168).

Almost surely, 2^381077221 is an apocalyptic number.

It is an amenable number.

381077221 is a deficient number, since it is larger than the sum of its proper divisors (54604123).

381077221 is a wasteful number, since it uses less digits than its factorization.

381077221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20571.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 381077221 is about 19521.1992715612. The cubic root of 381077221 is about 724.9994267138. Note that the first 3 decimals are identical.

The spelling of 381077221 in words is "three hundred eighty-one million, seventy-seven thousand, two hundred twenty-one".