245123220 has 48 divisors (see below), whose sum is σ = 702313920. Its totient is φ = 63845376.

The previous prime is 245123209. The next prime is 245123239. The reversal of 245123220 is 22321542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44925 + ... + 50084.

It is an arithmetic number, because the mean of its divisors is an integer number (14631540).

Almost surely, 2^245123220 is an apocalyptic number.

245123220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245123220 is an abundant number, since it is smaller than the sum of its proper divisors (457190700).

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

245123220 is a wasteful number, since it uses less digits than its factorization.

245123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95064 (or 95062 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 245123220 is about 15656.4114662333. The cubic root of 245123220 is about 625.8373586943.

Adding to 245123220 its reverse (22321542), we get a palindrome (267444762).

The spelling of 245123220 in words is "two hundred forty-five million, one hundred twenty-three thousand, two hundred twenty".