245221011 has 48 divisors (see below), whose sum is σ = 428064000. Its totient is φ = 132145344.

The previous prime is 245221003. The next prime is 245221021. The reversal of 245221011 is 110122542.

245221011 is a `hidden beast` number, since 2 + 452 + 210 + 1 + 1 = 666.

It is not a de Polignac number, because 245221011 - 2³ = 245221003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245221021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 417460 + ... + 418046.

It is an arithmetic number, because the mean of its divisors is an integer number (8918000).

Almost surely, 2^245221011 is an apocalyptic number.

245221011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

245221011 is a deficient number, since it is larger than the sum of its proper divisors (182842989).

245221011 is a wasteful number, since it uses less digits than its factorization.

245221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 965 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 245221011 is about 15659.5341884744. The cubic root of 245221011 is about 625.9205727941.

Adding to 245221011 its reverse (110122542), we get a palindrome (355343553).

The spelling of 245221011 in words is "two hundred forty-five million, two hundred twenty-one thousand, eleven".