381442795931 has 2 divisors, whose sum is σ = 381442795932. Its totient is φ = 381442795930.

The previous prime is 381442795897. The next prime is 381442795933. The reversal of 381442795931 is 139597244183.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381442795931 - 2²² = 381438601627 is a prime.

It is a super-2 number, since 2×381442795931² (a number of 24 digits) contains 22 as substring.

Together with 381442795933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (381442795933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190721397965 + 190721397966.

It is an arithmetic number, because the mean of its divisors is an integer number (190721397966).

Almost surely, 2^381442795931 is an apocalyptic number.

381442795931 is a deficient number, since it is larger than the sum of its proper divisors (1).

381442795931 is an equidigital number, since it uses as much as digits as its factorization.

381442795931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 56.

The spelling of 381442795931 in words is "three hundred eighty-one billion, four hundred forty-two million, seven hundred ninety-five thousand, nine hundred thirty-one".