381716311 has 4 divisors (see below), whose sum is σ = 382668624. Its totient is φ = 380764000.

The previous prime is 381716297. The next prime is 381716323. The reversal of 381716311 is 113617183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381716311 - 2¹⁹ = 381192023 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381716341) 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, 475555 + ... + 476356.

It is an arithmetic number, because the mean of its divisors is an integer number (95667156).

Almost surely, 2^381716311 is an apocalyptic number.

381716311 is a deficient number, since it is larger than the sum of its proper divisors (952313).

381716311 is an equidigital number, since it uses as much as digits as its factorization.

381716311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952312.

The product of its digits is 3024, while the sum is 31.

The square root of 381716311 is about 19537.5615418097. The cubic root of 381716311 is about 725.4044899421.

The spelling of 381716311 in words is "three hundred eighty-one million, seven hundred sixteen thousand, three hundred eleven".