248820209 has 16 divisors (see below), whose sum is σ = 278505216. Its totient is φ = 220358400.

The previous prime is 248820199. The next prime is 248820223. The reversal of 248820209 is 902028842.

It is a cyclic number.

It is not a de Polignac number, because 248820209 - 2⁴ = 248820193 is a prime.

It is a super-2 number, since 2×248820209² = 123822992813607362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (248820239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123599 + ... + 125595.

It is an arithmetic number, because the mean of its divisors is an integer number (17406576).

Almost surely, 2^248820209 is an apocalyptic number.

It is an amenable number.

248820209 is a deficient number, since it is larger than the sum of its proper divisors (29685007).

248820209 is a wasteful number, since it uses less digits than its factorization.

248820209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 248820209 is about 15774.0359134877. The cubic root of 248820209 is about 628.9679996661.

The spelling of 248820209 in words is "two hundred forty-eight million, eight hundred twenty thousand, two hundred nine".