857318481 has 6 divisors (see below), whose sum is σ = 1238348930. Its totient is φ = 571545648.

The previous prime is 857318479. The next prime is 857318509. The reversal of 857318481 is 184813758.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 857318400 + 81 = 29280^2 + 9^2 .

It is not a de Polignac number, because 857318481 - 2¹ = 857318479 is a prime.

It is a super-3 number, since 3×857318481³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857318411) 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 5 ways as a sum of consecutive naturals, for example, 47628796 + ... + 47628813.

Almost surely, 2^857318481 is an apocalyptic number.

It is an amenable number.

857318481 is a deficient number, since it is larger than the sum of its proper divisors (381030449).

857318481 is a wasteful number, since it uses less digits than its factorization.

857318481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95257615 (or 95257612 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 857318481 is about 29280.0013831967. The cubic root of 857318481 is about 949.9791245644.

It can be divided in two parts, 8573184 and 81, that multiplied together give a square (694427904 = 26352²).

The spelling of 857318481 in words is "eight hundred fifty-seven million, three hundred eighteen thousand, four hundred eighty-one".