381146851 has 4 divisors (see below), whose sum is σ = 403567272. Its totient is φ = 358726432.

The previous prime is 381146839. The next prime is 381146863. The reversal of 381146851 is 158641183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158641183 = 569 ⋅278807.

It is an interprime number because it is at equal distance from previous prime (381146839) and next prime (381146863).

It is a cyclic number.

It is not a de Polignac number, because 381146851 - 2⁵ = 381146819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381146851.

It is not an unprimeable number, because it can be changed into a prime (381146881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11210185 + ... + 11210218.

It is an arithmetic number, because the mean of its divisors is an integer number (100891818).

Almost surely, 2^381146851 is an apocalyptic number.

381146851 is a deficient number, since it is larger than the sum of its proper divisors (22420421).

381146851 is a wasteful number, since it uses less digits than its factorization.

381146851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22420420.

The product of its digits is 23040, while the sum is 37.

The square root of 381146851 is about 19522.9826358577. The cubic root of 381146851 is about 725.0435810504.

The spelling of 381146851 in words is "three hundred eighty-one million, one hundred forty-six thousand, eight hundred fifty-one".