245222220 has 24 divisors (see below), whose sum is σ = 686622384. Its totient is φ = 65392576.

The previous prime is 245222203. The next prime is 245222221. The reversal of 245222220 is 22222542.

It is not an unprimeable number, because it can be changed into a prime (245222221) 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, 2043459 + ... + 2043578.

It is an arithmetic number, because the mean of its divisors is an integer number (28609266).

Almost surely, 2^245222220 is an apocalyptic number.

245222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245222220 is an abundant number, since it is smaller than the sum of its proper divisors (441400164).

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

245222220 is a wasteful number, since it uses less digits than its factorization.

245222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4087049 (or 4087047 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 245222220 is about 15659.5727911077. The cubic root of 245222220 is about 625.9216014400.

Adding to 245222220 its reverse (22222542), we get a palindrome (267444762).

The spelling of 245222220 in words is "two hundred forty-five million, two hundred twenty-two thousand, two hundred twenty".