499855257 has 24 divisors (see below), whose sum is σ = 801010080. Its totient is φ = 297804480.

The previous prime is 499855247. The next prime is 499855261. The reversal of 499855257 is 752558994.

It is not a de Polignac number, because 499855257 - 2⁴ = 499855241 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (499855207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36948 + ... + 48629.

It is an arithmetic number, because the mean of its divisors is an integer number (33375420).

Almost surely, 2^499855257 is an apocalyptic number.

It is an amenable number.

499855257 is a deficient number, since it is larger than the sum of its proper divisors (301154823).

499855257 is a wasteful number, since it uses less digits than its factorization.

499855257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85653 (or 85650 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 54.

The square root of 499855257 is about 22357.4429888572. The cubic root of 499855257 is about 793.6239301957.

The spelling of 499855257 in words is "four hundred ninety-nine million, eight hundred fifty-five thousand, two hundred fifty-seven".