249998255 has 8 divisors (see below), whose sum is σ = 323074752. Its totient is φ = 184614048.

The previous prime is 249998251. The next prime is 249998263. The reversal of 249998255 is 552899942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 249998255 - 2² = 249998251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249998197 and 249998206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249998251) 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 7 ways as a sum of consecutive naturals, for example, 1922999 + ... + 1923128.

It is an arithmetic number, because the mean of its divisors is an integer number (40384344).

Almost surely, 2^249998255 is an apocalyptic number.

249998255 is a deficient number, since it is larger than the sum of its proper divisors (73076497).

249998255 is a wasteful number, since it uses less digits than its factorization.

249998255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846145.

The product of its digits is 2332800, while the sum is 53.

The square root of 249998255 is about 15811.3331190004. Note that the first 3 decimals coincide. The cubic root of 249998255 is about 629.9590592359.

The spelling of 249998255 in words is "two hundred forty-nine million, nine hundred ninety-eight thousand, two hundred fifty-five".