381039331 has 2 divisors, whose sum is σ = 381039332. Its totient is φ = 381039330.

The previous prime is 381039311. The next prime is 381039353. The reversal of 381039331 is 133930183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381039331 - 2⁵ = 381039299 is a prime.

It is a super-2 number, since 2×381039331² = 290381943537855122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381039293 and 381039302.

It is not a weakly prime, because it can be changed into another prime (381039311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190519665 + 190519666.

It is an arithmetic number, because the mean of its divisors is an integer number (190519666).

Almost surely, 2^381039331 is an apocalyptic number.

381039331 is a deficient number, since it is larger than the sum of its proper divisors (1).

381039331 is an equidigital number, since it uses as much as digits as its factorization.

381039331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 381039331 is about 19520.2287640284. The cubic root of 381039331 is about 724.9753973419.

The spelling of 381039331 in words is "three hundred eighty-one million, thirty-nine thousand, three hundred thirty-one".