381488551 has 8 divisors (see below), whose sum is σ = 409043520. Its totient is φ = 354501888.

The previous prime is 381488521. The next prime is 381488563. The reversal of 381488551 is 155884183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381488551 - 2⁹ = 381488039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381488498 and 381488507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381488521) 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 7 ways as a sum of consecutive naturals, for example, 140686 + ... + 143371.

It is an arithmetic number, because the mean of its divisors is an integer number (51130440).

Almost surely, 2^381488551 is an apocalyptic number.

381488551 is a deficient number, since it is larger than the sum of its proper divisors (27554969).

381488551 is a wasteful number, since it uses less digits than its factorization.

381488551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284153.

The product of its digits is 153600, while the sum is 43.

The square root of 381488551 is about 19531.7318996550. The cubic root of 381488551 is about 725.2601846966.

The spelling of 381488551 in words is "three hundred eighty-one million, four hundred eighty-eight thousand, five hundred fifty-one".