381881051 has 2 divisors, whose sum is σ = 381881052. Its totient is φ = 381881050.

The previous prime is 381881041. The next prime is 381881083. The reversal of 381881051 is 150188183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381881051 - 2¹⁴ = 381864667 is a prime.

It is a super-2 number, since 2×381881051² = 291666274225729202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (381881041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190940525 + 190940526.

It is an arithmetic number, because the mean of its divisors is an integer number (190940526).

Almost surely, 2^381881051 is an apocalyptic number.

381881051 is a deficient number, since it is larger than the sum of its proper divisors (1).

381881051 is an equidigital number, since it uses as much as digits as its factorization.

381881051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 35.

The square root of 381881051 is about 19541.7770686291. Note that the first 3 decimals coincide. The cubic root of 381881051 is about 725.5088309101.

The spelling of 381881051 in words is "three hundred eighty-one million, eight hundred eighty-one thousand, fifty-one".