249479055 has 128 divisors (see below), whose sum is σ = 534159360. Its totient is φ = 108103680.

The previous prime is 249479047. The next prime is 249479057. The reversal of 249479055 is 550974942.

It is not a de Polignac number, because 249479055 - 2³ = 249479047 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 249479055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249479057) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1820947 + ... + 1821083.

It is an arithmetic number, because the mean of its divisors is an integer number (4173120).

Almost surely, 2^249479055 is an apocalyptic number.

249479055 is an abundant number, since it is smaller than the sum of its proper divisors (284680305).

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

249479055 is a wasteful number, since it uses less digits than its factorization.

249479055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 249479055 is about 15794.9059826262. The cubic root of 249479055 is about 629.5226542835.

The spelling of 249479055 in words is "two hundred forty-nine million, four hundred seventy-nine thousand, fifty-five".