163225620 has 36 divisors (see below), whose sum is σ = 495118260. Its totient is φ = 43526784.

The previous prime is 163225603. The next prime is 163225631. The reversal of 163225620 is 26522361.

163225620 is a `hidden beast` number, since 1 + 6 + 32 + 2 + 5 + 620 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 115863696 + 47361924 = 10764^2 + 6882^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 453225 + ... + 453584.

It is an arithmetic number, because the mean of its divisors is an integer number (13753285).

Almost surely, 2^163225620 is an apocalyptic number.

163225620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163225620 is an abundant number, since it is smaller than the sum of its proper divisors (331892640).

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

163225620 is a wasteful number, since it uses less digits than its factorization.

163225620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906824 (or 906819 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 163225620 is about 12775.9782404323. The cubic root of 163225620 is about 546.5074781054.

Adding to 163225620 its reverse (26522361), we get a palindrome (189747981).

The spelling of 163225620 in words is "one hundred sixty-three million, two hundred twenty-five thousand, six hundred twenty".