249387255 has 112 divisors (see below), whose sum is σ = 510474720. Its totient is φ = 115893504.

The previous prime is 249387253. The next prime is 249387283. The reversal of 249387255 is 552783942.

249387255 is a `hidden beast` number, since 249 + 387 + 25 + 5 = 666.

It is not a de Polignac number, because 249387255 - 2¹ = 249387253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 249387255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249387253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 900177 + ... + 900453.

It is an arithmetic number, because the mean of its divisors is an integer number (4557810).

Almost surely, 2^249387255 is an apocalyptic number.

249387255 is an abundant number, since it is smaller than the sum of its proper divisors (261087465).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249387255 is a wasteful number, since it uses less digits than its factorization.

249387255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 317 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 249387255 is about 15791.9997150456. Note that the first 3 decimals coincide. The cubic root of 249387255 is about 629.4454303399.

The spelling of 249387255 in words is "two hundred forty-nine million, three hundred eighty-seven thousand, two hundred fifty-five".