248019561 has 12 divisors (see below), whose sum is σ = 369807360. Its totient is φ = 160012440.

The previous prime is 248019529. The next prime is 248019587. The reversal of 248019561 is 165910842.

248019561 is a `hidden beast` number, since 2 + 4 + 80 + 19 + 561 = 666.

It is not a de Polignac number, because 248019561 - 2⁵ = 248019529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (248019361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444201 + ... + 444758.

It is an arithmetic number, because the mean of its divisors is an integer number (30817280).

Almost surely, 2^248019561 is an apocalyptic number.

It is an amenable number.

248019561 is a deficient number, since it is larger than the sum of its proper divisors (121787799).

248019561 is a wasteful number, since it uses less digits than its factorization.

248019561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888996 (or 888993 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 248019561 is about 15748.6367981486. The cubic root of 248019561 is about 628.2926484706.

The spelling of 248019561 in words is "two hundred forty-eight million, nineteen thousand, five hundred sixty-one".