245221333 has 20 divisors (see below), whose sum is σ = 289007180. Its totient is φ = 208039104.

The previous prime is 245221309. The next prime is 245221337. The reversal of 245221333 is 333122542.

It can be written as a sum of positive squares in 2 ways, for example, as 80407089 + 164814244 = 8967^2 + 12838^2 .

It is a de Polignac number, because none of the positive numbers 2^k-245221333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 245221298 and 245221307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245221337) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 261241 + ... + 262177.

It is an arithmetic number, because the mean of its divisors is an integer number (14450359).

Almost surely, 2^245221333 is an apocalyptic number.

It is an amenable number.

245221333 is a deficient number, since it is larger than the sum of its proper divisors (43785847).

245221333 is an frugal number, since it uses more digits than its factorization.

245221333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1053 counting only the distinct ones).

The product of its digits is 4320, while the sum is 25.

The square root of 245221333 is about 15659.5444697475. The cubic root of 245221333 is about 625.9208467597.

Adding to 245221333 its reverse (333122542), we get a palindrome (578343875).

The spelling of 245221333 in words is "two hundred forty-five million, two hundred twenty-one thousand, three hundred thirty-three".