245221212 has 12 divisors (see below), whose sum is σ = 572182856. Its totient is φ = 81740400.

The previous prime is 245221199. The next prime is 245221241. The reversal of 245221212 is 212122542.

245221212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10217539 + ... + 10217562.

Almost surely, 2^245221212 is an apocalyptic number.

It is an amenable number.

245221212 is an abundant number, since it is smaller than the sum of its proper divisors (326961644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245221212 is a wasteful number, since it uses less digits than its factorization.

245221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20435108 (or 20435106 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 245221212 is about 15659.5406062886. The cubic root of 245221212 is about 625.9207438099.

Adding to 245221212 its reverse (212122542), we get a palindrome (457343754).

The spelling of 245221212 in words is "two hundred forty-five million, two hundred twenty-one thousand, two hundred twelve".