385106257 has 4 divisors (see below), whose sum is σ = 385187440. Its totient is φ = 385025076.

The previous prime is 385106251. The next prime is 385106327. The reversal of 385106257 is 752601583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 752601583 = 113 ⋅6660191.

It is a cyclic number.

It is not a de Polignac number, because 385106257 - 2¹⁹ = 384581969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385106251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33003 + ... + 43120.

It is an arithmetic number, because the mean of its divisors is an integer number (96296860).

Almost surely, 2^385106257 is an apocalyptic number.

It is an amenable number.

385106257 is a deficient number, since it is larger than the sum of its proper divisors (81183).

385106257 is an equidigital number, since it uses as much as digits as its factorization.

385106257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81182.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 385106257 is about 19624.1243626308. The cubic root of 385106257 is about 727.5455548679.

The spelling of 385106257 in words is "three hundred eighty-five million, one hundred six thousand, two hundred fifty-seven".