381534381 has 40 divisors (see below), whose sum is σ = 582871520. Its totient is φ = 248653152.

The previous prime is 381534359. The next prime is 381534401. The reversal of 381534381 is 183435183.

It is not a de Polignac number, because 381534381 - 2⁹ = 381533869 is a prime.

It is a super-2 number, since 2×381534381² = 291136967770106322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381534311) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1242630 + ... + 1242936.

It is an arithmetic number, because the mean of its divisors is an integer number (14571788).

Almost surely, 2^381534381 is an apocalyptic number.

It is an amenable number.

381534381 is a deficient number, since it is larger than the sum of its proper divisors (201337139).

381534381 is a wasteful number, since it uses less digits than its factorization.

381534381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 606 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 381534381 is about 19532.9050834739. The cubic root of 381534381 is about 725.2892264972.

The spelling of 381534381 in words is "three hundred eighty-one million, five hundred thirty-four thousand, three hundred eighty-one".