245863221 has 8 divisors (see below), whose sum is σ = 327956064. Its totient is φ = 163839600.

The previous prime is 245863217. The next prime is 245863229. The reversal of 245863221 is 122368542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 245863221 - 2² = 245863217 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 (245863229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8355 + ... + 23696.

It is an arithmetic number, because the mean of its divisors is an integer number (40994508).

Almost surely, 2^245863221 is an apocalyptic number.

It is an amenable number.

245863221 is a deficient number, since it is larger than the sum of its proper divisors (82092843).

245863221 is a wasteful number, since it uses less digits than its factorization.

245863221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34611.

The product of its digits is 23040, while the sum is 33.

The square root of 245863221 is about 15680.0261798251. The cubic root of 245863221 is about 626.4665048768.

It can be divided in two parts, 2458632 and 21, that added together give a triangular number (2458653 = T₂₂₁₇).

The spelling of 245863221 in words is "two hundred forty-five million, eight hundred sixty-three thousand, two hundred twenty-one".