163205240 has 64 divisors (see below), whose sum is σ = 418037760. Its totient is φ = 56763520.

The previous prime is 163205227. The next prime is 163205249. The reversal of 163205240 is 42502361.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163205249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2057 + ... + 18183.

It is an arithmetic number, because the mean of its divisors is an integer number (6531840).

Almost surely, 2^163205240 is an apocalyptic number.

163205240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163205240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209018880).

163205240 is an abundant number, since it is smaller than the sum of its proper divisors (254832520).

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

163205240 is a wasteful number, since it uses less digits than its factorization.

163205240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16172 (or 16168 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 163205240 is about 12775.1806249462. The cubic root of 163205240 is about 546.4847319091.

The spelling of 163205240 in words is "one hundred sixty-three million, two hundred five thousand, two hundred forty".