245548221 has 16 divisors (see below), whose sum is σ = 355114368. Its totient is φ = 150310400.

The previous prime is 245548213. The next prime is 245548273. The reversal of 245548221 is 122845542.

It is a cyclic number.

It is not a de Polignac number, because 245548221 - 2³ = 245548213 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245540221) 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, 56625 + ... + 60806.

It is an arithmetic number, because the mean of its divisors is an integer number (22194648).

Almost surely, 2^245548221 is an apocalyptic number.

It is an amenable number.

245548221 is a deficient number, since it is larger than the sum of its proper divisors (109566147).

245548221 is a wasteful number, since it uses less digits than its factorization.

245548221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117492.

The product of its digits is 25600, while the sum is 33.

The square root of 245548221 is about 15669.9783343820. The cubic root of 245548221 is about 626.1988475397.

The spelling of 245548221 in words is "two hundred forty-five million, five hundred forty-eight thousand, two hundred twenty-one".