245543820 has 48 divisors (see below), whose sum is σ = 690439680. Its totient is φ = 65200576.

The previous prime is 245543759. The next prime is 245543843. The reversal of 245543820 is 28345542.

245543820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 5779 + ... + 22901.

It is an arithmetic number, because the mean of its divisors is an integer number (14384160).

Almost surely, 2^245543820 is an apocalyptic number.

245543820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245543820 is an abundant number, since it is smaller than the sum of its proper divisors (444895860).

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

245543820 is a wasteful number, since it uses less digits than its factorization.

245543820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17374 (or 17372 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The square root of 245543820 is about 15669.8379059900. The cubic root of 245543820 is about 626.1951063633.

The spelling of 245543820 in words is "two hundred forty-five million, five hundred forty-three thousand, eight hundred twenty".