499385181 has 16 divisors (see below), whose sum is σ = 670593600. Its totient is φ = 330559488.

The previous prime is 499385179. The next prime is 499385213. The reversal of 499385181 is 181583994.

It is not a de Polignac number, because 499385181 - 2¹ = 499385179 is a prime.

It is a super-2 number, since 2×499385181² = 498771118004805522, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 499385181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499385111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291355 + ... + 293063.

It is an arithmetic number, because the mean of its divisors is an integer number (41912100).

Almost surely, 2^499385181 is an apocalyptic number.

It is an amenable number.

499385181 is a deficient number, since it is larger than the sum of its proper divisors (171208419).

499385181 is a wasteful number, since it uses less digits than its factorization.

499385181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348.

The product of its digits is 311040, while the sum is 48.

The square root of 499385181 is about 22346.9277754236. The cubic root of 499385181 is about 793.3750711079.

The spelling of 499385181 in words is "four hundred ninety-nine million, three hundred eighty-five thousand, one hundred eighty-one".