249775505 has 8 divisors (see below), whose sum is σ = 342549312. Its totient is φ = 171274608.

The previous prime is 249775499. The next prime is 249775549. The reversal of 249775505 is 505577942.

249775505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 249775505 - 2²⁴ = 232998289 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3568187 + ... + 3568256.

It is an arithmetic number, because the mean of its divisors is an integer number (42818664).

Almost surely, 2^249775505 is an apocalyptic number.

It is an amenable number.

249775505 is a deficient number, since it is larger than the sum of its proper divisors (92773807).

249775505 is an equidigital number, since it uses as much as digits as its factorization.

249775505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7136455.

The product of its (nonzero) digits is 441000, while the sum is 44.

The square root of 249775505 is about 15804.2875511679. The cubic root of 249775505 is about 629.7719044930.

The spelling of 249775505 in words is "two hundred forty-nine million, seven hundred seventy-five thousand, five hundred five".