249479555 has 16 divisors (see below), whose sum is σ = 323102304. Its totient is φ = 183832320.

The previous prime is 249479521. The next prime is 249479561. The reversal of 249479555 is 555974942.

It is not a de Polignac number, because 249479555 - 2²² = 245285251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28007 + ... + 35823.

It is an arithmetic number, because the mean of its divisors is an integer number (20193894).

Almost surely, 2^249479555 is an apocalyptic number.

249479555 is a deficient number, since it is larger than the sum of its proper divisors (73622749).

249479555 is a wasteful number, since it uses less digits than its factorization.

249479555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8326.

The product of its digits is 2268000, while the sum is 50.

The square root of 249479555 is about 15794.9218105061. The cubic root of 249479555 is about 629.5230748414.

The spelling of 249479555 in words is "two hundred forty-nine million, four hundred seventy-nine thousand, five hundred fifty-five".