381218383 has 24 divisors (see below), whose sum is σ = 484354080. Its totient is φ = 297339840.

The previous prime is 381218359. The next prime is 381218393. The reversal of 381218383 is 383812183.

It is not a de Polignac number, because 381218383 - 2⁹ = 381217871 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381218303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41013 + ... + 49441.

It is an arithmetic number, because the mean of its divisors is an integer number (20181420).

Almost surely, 2^381218383 is an apocalyptic number.

381218383 is a deficient number, since it is larger than the sum of its proper divisors (103135697).

381218383 is a wasteful number, since it uses less digits than its factorization.

381218383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8527 (or 8520 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 381218383 is about 19524.8145445738. The cubic root of 381218383 is about 725.0889358991.

The spelling of 381218383 in words is "three hundred eighty-one million, two hundred eighteen thousand, three hundred eighty-three".