163215625 has 24 divisors (see below), whose sum is σ = 211158360. Its totient is φ = 126000000.

The previous prime is 163215593. The next prime is 163215677. The reversal of 163215625 is 526512361.

163215625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 159163456 + 4052169 = 12616^2 + 2013^2 .

It is not a de Polignac number, because 163215625 - 2⁵ = 163215593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89725 + ... + 91525.

It is an arithmetic number, because the mean of its divisors is an integer number (8798265).

Almost surely, 2^163215625 is an apocalyptic number.

It is an amenable number.

163215625 is a deficient number, since it is larger than the sum of its proper divisors (47942735).

163215625 is an frugal number, since it uses more digits than its factorization.

163215625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855 (or 1835 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 163215625 is about 12775.5870706594. The cubic root of 163215625 is about 546.4963228841.

Adding to 163215625 its reverse (526512361), we get a palindrome (689727986).

The spelling of 163215625 in words is "one hundred sixty-three million, two hundred fifteen thousand, six hundred twenty-five".