163515625 has 64 divisors (see below), whose sum is σ = 262499328. Its totient is φ = 99000000.

The previous prime is 163515589. The next prime is 163515629. The reversal of 163515625 is 526515361.

It is not a de Polignac number, because 163515625 - 2⁷ = 163515497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163515629) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7109364 + ... + 7109386.

It is an arithmetic number, because the mean of its divisors is an integer number (4101552).

Almost surely, 2^163515625 is an apocalyptic number.

It is an amenable number.

163515625 is a deficient number, since it is larger than the sum of its proper divisors (98983703).

163515625 is an frugal number, since it uses more digits than its factorization.

163515625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 48 counting only the distinct ones).

The product of its digits is 27000, while the sum is 34.

The square root of 163515625 is about 12787.3228237970. The cubic root of 163515625 is about 546.8309488327.

It can be divided in two parts, 16 and 3515625, that multiplied together give a square (56250000 = 7500²).

The spelling of 163515625 in words is "one hundred sixty-three million, five hundred fifteen thousand, six hundred twenty-five".