249775255 has 4 divisors (see below), whose sum is σ = 299730312. Its totient is φ = 199820200.

The previous prime is 249775241. The next prime is 249775333. The reversal of 249775255 is 552577942.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 249775255 - 2¹¹ = 249773207 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, 24977521 + ... + 24977530.

It is an arithmetic number, because the mean of its divisors is an integer number (74932578).

Almost surely, 2^249775255 is an apocalyptic number.

249775255 is a deficient number, since it is larger than the sum of its proper divisors (49955057).

249775255 is an equidigital number, since it uses as much as digits as its factorization.

249775255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49955056.

The product of its digits is 882000, while the sum is 46.

The square root of 249775255 is about 15804.2796419198. The cubic root of 249775255 is about 629.7716943803.

The spelling of 249775255 in words is "two hundred forty-nine million, seven hundred seventy-five thousand, two hundred fifty-five".