205163040 has 48 divisors (see below), whose sum is σ = 646265088. Its totient is φ = 54710016.

The previous prime is 205163033. The next prime is 205163087. The reversal of 205163040 is 40361502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 205162998 and 205163016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213232 + ... + 214191.

It is an arithmetic number, because the mean of its divisors is an integer number (13463856).

Almost surely, 2^205163040 is an apocalyptic number.

205163040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205163040 is an abundant number, since it is smaller than the sum of its proper divisors (441102048).

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

205163040 is a wasteful number, since it uses less digits than its factorization.

205163040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427441 (or 427433 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 205163040 is about 14323.5135354423. The cubic root of 205163040 is about 589.7931286607.

The spelling of 205163040 in words is "two hundred five million, one hundred sixty-three thousand, forty".