381280881 has 4 divisors (see below), whose sum is σ = 508374512. Its totient is φ = 254187252.

The previous prime is 381280859. The next prime is 381280903. The reversal of 381280881 is 188082183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 188082183 = 3 ⋅62694061.

It is an interprime number because it is at equal distance from previous prime (381280859) and next prime (381280903).

It is not a de Polignac number, because 381280881 - 2⁵ = 381280849 is a prime.

It is a super-2 number, since 2×381280881² = 290750220432272322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381280181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63546811 + ... + 63546816.

It is an arithmetic number, because the mean of its divisors is an integer number (127093628).

Almost surely, 2^381280881 is an apocalyptic number.

It is an amenable number.

381280881 is a deficient number, since it is larger than the sum of its proper divisors (127093631).

381280881 is a wasteful number, since it uses less digits than its factorization.

381280881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127093630.

The product of its (nonzero) digits is 24576, while the sum is 39.

The square root of 381280881 is about 19526.4149551319. The cubic root of 381280881 is about 725.1285580983.

The spelling of 381280881 in words is "three hundred eighty-one million, two hundred eighty thousand, eight hundred eighty-one".