499981255 has 4 divisors (see below), whose sum is σ = 599977512. Its totient is φ = 399985000.

The previous prime is 499981249. The next prime is 499981319. The reversal of 499981255 is 552189994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552189994 = 2 ⋅276094997.

It is not a de Polignac number, because 499981255 - 2³ = 499981247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49998121 + ... + 49998130.

It is an arithmetic number, because the mean of its divisors is an integer number (149994378).

Almost surely, 2^499981255 is an apocalyptic number.

499981255 is a deficient number, since it is larger than the sum of its proper divisors (99996257).

499981255 is an equidigital number, since it uses as much as digits as its factorization.

499981255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99996256.

The product of its digits is 1166400, while the sum is 52.

The square root of 499981255 is about 22360.2606201269. The cubic root of 499981255 is about 793.6906072492.

The spelling of 499981255 in words is "four hundred ninety-nine million, nine hundred eighty-one thousand, two hundred fifty-five".