385211771 has 4 divisors (see below), whose sum is σ = 440242032. Its totient is φ = 330181512.

The previous prime is 385211741. The next prime is 385211779. The reversal of 385211771 is 177112583.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177112583 = 547 ⋅323789.

It is a cyclic number.

It is not a de Polignac number, because 385211771 - 2¹⁸ = 384949627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385211779) 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, 27515120 + ... + 27515133.

It is an arithmetic number, because the mean of its divisors is an integer number (110060508).

Almost surely, 2^385211771 is an apocalyptic number.

385211771 is a deficient number, since it is larger than the sum of its proper divisors (55030261).

385211771 is an equidigital number, since it uses as much as digits as its factorization.

385211771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55030260.

The product of its digits is 11760, while the sum is 35.

The square root of 385211771 is about 19626.8125532395. The cubic root of 385211771 is about 727.6119947403.

The spelling of 385211771 in words is "three hundred eighty-five million, two hundred eleven thousand, seven hundred seventy-one".