381441451 has 4 divisors (see below), whose sum is σ = 385727400. Its totient is φ = 377155504.

The previous prime is 381441419. The next prime is 381441509. The reversal of 381441451 is 154144183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381441451 - 2⁵ = 381441419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381441551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2142841 + ... + 2143018.

It is an arithmetic number, because the mean of its divisors is an integer number (96431850).

Almost surely, 2^381441451 is an apocalyptic number.

381441451 is a deficient number, since it is larger than the sum of its proper divisors (4285949).

381441451 is an equidigital number, since it uses as much as digits as its factorization.

381441451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4285948.

The product of its digits is 7680, while the sum is 31.

The square root of 381441451 is about 19530.5261321860. The cubic root of 381441451 is about 725.2303356919.

The spelling of 381441451 in words is "three hundred eighty-one million, four hundred forty-one thousand, four hundred fifty-one".