163224640 has 28 divisors (see below), whose sum is σ = 388679436. Its totient is φ = 65289728.

The previous prime is 163224619. The next prime is 163224643. The reversal of 163224640 is 46422361.

It can be written as a sum of positive squares in 2 ways, for example, as 113550336 + 49674304 = 10656^2 + 7048^2 .

It is a junction number, because it is equal to n+sod(n) for n = 163224599 and 163224608.

It is not an unprimeable number, because it can be changed into a prime (163224643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254719 + ... + 255358.

Almost surely, 2^163224640 is an apocalyptic number.

163224640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163224640 is an abundant number, since it is smaller than the sum of its proper divisors (225454796).

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

163224640 is an equidigital number, since it uses as much as digits as its factorization.

163224640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510094 (or 510084 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 163224640 is about 12775.9398871472. The cubic root of 163224640 is about 546.5063843669.

The spelling of 163224640 in words is "one hundred sixty-three million, two hundred twenty-four thousand, six hundred forty".