385501871 has 2 divisors, whose sum is σ = 385501872. Its totient is φ = 385501870.

The previous prime is 385501861. The next prime is 385501891. The reversal of 385501871 is 178105583.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 385501871 - 2¹⁸ = 385239727 is a prime.

It is a super-2 number, since 2×385501871² = 297223385089001282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385501801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192750935 + 192750936.

It is an arithmetic number, because the mean of its divisors is an integer number (192750936).

Almost surely, 2^385501871 is an apocalyptic number.

385501871 is a deficient number, since it is larger than the sum of its proper divisors (1).

385501871 is an equidigital number, since it uses as much as digits as its factorization.

385501871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 38.

The square root of 385501871 is about 19634.2015625795. The cubic root of 385501871 is about 727.7946018932.

The spelling of 385501871 in words is "three hundred eighty-five million, five hundred one thousand, eight hundred seventy-one".