381820223 has 2 divisors, whose sum is σ = 381820224. Its totient is φ = 381820222.

The previous prime is 381820213. The next prime is 381820237. The reversal of 381820223 is 322028183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381820223 - 2⁴ = 381820207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381820213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190910111 + 190910112.

It is an arithmetic number, because the mean of its divisors is an integer number (190910112).

Almost surely, 2^381820223 is an apocalyptic number.

381820223 is a deficient number, since it is larger than the sum of its proper divisors (1).

381820223 is an equidigital number, since it uses as much as digits as its factorization.

381820223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 381820223 is about 19540.2206487030. The cubic root of 381820223 is about 725.4703079247.

The spelling of 381820223 in words is "three hundred eighty-one million, eight hundred twenty thousand, two hundred twenty-three".