381309229 has 6 divisors (see below), whose sum is σ = 443563854. Its totient is φ = 326836440.

The previous prime is 381309199. The next prime is 381309259. The reversal of 381309229 is 922903183.

It is an interprime number because it is at equal distance from previous prime (381309199) and next prime (381309259).

It can be written as a sum of positive squares in only one way, i.e., 360924004 + 20385225 = 18998^2 + 4515^2 .

It is not a de Polignac number, because 381309229 - 2¹⁷ = 381178157 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 (381309259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3890862 + ... + 3890959.

It is an arithmetic number, because the mean of its divisors is an integer number (73927309).

Almost surely, 2^381309229 is an apocalyptic number.

It is an amenable number.

381309229 is a deficient number, since it is larger than the sum of its proper divisors (62254625).

381309229 is an equidigital number, since it uses as much as digits as its factorization.

381309229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7781835 (or 7781828 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 381309229 is about 19527.1408301369. The cubic root of 381309229 is about 725.1465286077.

The spelling of 381309229 in words is "three hundred eighty-one million, three hundred nine thousand, two hundred twenty-nine".