383281 has 2 divisors, whose sum is σ = 383282. Its totient is φ = 383280.

The previous prime is 383267. The next prime is 383291. The reversal of 383281 is 182383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230400 + 152881 = 480^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 383281 - 2⁷ = 383153 is a prime.

It is a super-2 number, since 2×383281² = 293808649922, which contains 22 as substring.

383281 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (383221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191640 + 191641.

It is an arithmetic number, because the mean of its divisors is an integer number (191641).

2³⁸³²⁸¹ is an apocalyptic number.

It is an amenable number.

383281 is a deficient number, since it is larger than the sum of its proper divisors (1).

383281 is an equidigital number, since it uses as much as digits as its factorization.

383281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 383281 is about 619.0969229450. The cubic root of 383281 is about 72.6394304497.

The spelling of 383281 in words is "three hundred eighty-three thousand, two hundred eighty-one".