163585425 has 12 divisors (see below), whose sum is σ = 270461360. Its totient is φ = 87245520.

The previous prime is 163585423. The next prime is 163585439. The reversal of 163585425 is 524585361.

It is not a de Polignac number, because 163585425 - 2¹ = 163585423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163585423) by changing a digit.

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, 1090495 + ... + 1090644.

Almost surely, 2^163585425 is an apocalyptic number.

163585425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163585425 is a deficient number, since it is larger than the sum of its proper divisors (106875935).

163585425 is a wasteful number, since it uses less digits than its factorization.

163585425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181152 (or 2181147 counting only the distinct ones).

The product of its digits is 144000, while the sum is 39.

The square root of 163585425 is about 12790.0517981750. The cubic root of 163585425 is about 546.9087464345.

The spelling of 163585425 in words is "one hundred sixty-three million, five hundred eighty-five thousand, four hundred twenty-five".