245775220 has 24 divisors (see below), whose sum is σ = 527111424. Its totient is φ = 96218016.

The previous prime is 245775209. The next prime is 245775227. The reversal of 245775220 is 22577542.

It is a happy number.

245775220 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

245775220 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245775227) 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, 129792 + ... + 131671.

It is an arithmetic number, because the mean of its divisors is an integer number (21962976).

Almost surely, 2^245775220 is an apocalyptic number.

245775220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245775220 is an abundant number, since it is smaller than the sum of its proper divisors (281336204).

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

245775220 is a wasteful number, since it uses less digits than its factorization.

245775220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261519 (or 261517 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 245775220 is about 15677.2197790297. The cubic root of 245775220 is about 626.3917529376.

It can be divided in two parts, 2457 and 75220, that added together give a palindrome (77677).

The spelling of 245775220 in words is "two hundred forty-five million, seven hundred seventy-five thousand, two hundred twenty".