249995055 has 16 divisors (see below), whose sum is σ = 403144704. Its totient is φ = 132279840.

The previous prime is 249995033. The next prime is 249995063. The reversal of 249995055 is 550599942.

It is a happy number.

It is not a de Polignac number, because 249995055 - 2¹⁵ = 249962287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249994995 and 249995013.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 63711 + ... + 67520.

It is an arithmetic number, because the mean of its divisors is an integer number (25196544).

Almost surely, 2^249995055 is an apocalyptic number.

249995055 is a deficient number, since it is larger than the sum of its proper divisors (153149649).

249995055 is a wasteful number, since it uses less digits than its factorization.

249995055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131366.

The product of its (nonzero) digits is 729000, while the sum is 48.

The square root of 249995055 is about 15811.2319254383. The cubic root of 249995055 is about 629.9563713803.

The spelling of 249995055 in words is "two hundred forty-nine million, nine hundred ninety-five thousand, fifty-five".