381381511 has 8 divisors (see below), whose sum is σ = 436243104. Its totient is φ = 326614560.

The previous prime is 381381493. The next prime is 381381527. The reversal of 381381511 is 115183183.

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 381381511 - 2⁹ = 381380999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381381551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14800 + ... + 31333.

It is an arithmetic number, because the mean of its divisors is an integer number (54530388).

Almost surely, 2^381381511 is an apocalyptic number.

381381511 is a deficient number, since it is larger than the sum of its proper divisors (54861593).

381381511 is a wasteful number, since it uses less digits than its factorization.

381381511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47321.

The product of its digits is 2880, while the sum is 31.

The square root of 381381511 is about 19528.9915510249. The cubic root of 381381511 is about 725.1923459529.

The spelling of 381381511 in words is "three hundred eighty-one million, three hundred eighty-one thousand, five hundred eleven".