163243725 has 48 divisors (see below), whose sum is σ = 287273280. Its totient is φ = 81561600.

The previous prime is 163243723. The next prime is 163243727. The reversal of 163243725 is 527342361.

It is an interprime number because it is at equal distance from previous prime (163243723) and next prime (163243727).

It is not a de Polignac number, because 163243725 - 2¹ = 163243723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163243723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137635 + ... + 138815.

It is an arithmetic number, because the mean of its divisors is an integer number (5984860).

Almost surely, 2^163243725 is an apocalyptic number.

163243725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163243725 is a deficient number, since it is larger than the sum of its proper divisors (124029555).

163243725 is a wasteful number, since it uses less digits than its factorization.

163243725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310 (or 1305 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 163243725 is about 12776.6867770952. The cubic root of 163243725 is about 546.5276835773.

The spelling of 163243725 in words is "one hundred sixty-three million, two hundred forty-three thousand, seven hundred twenty-five".