163215233 has 4 divisors (see below), whose sum is σ = 163529028. Its totient is φ = 162901440.

The previous prime is 163215209. The next prime is 163215257. The reversal of 163215233 is 332512361.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (163215209) and next prime (163215257).

It can be written as a sum of positive squares in 2 ways, for example, as 35796289 + 127418944 = 5983^2 + 11288^2 .

It is a cyclic number.

It is not a de Polignac number, because 163215233 - 2²² = 159020929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163215733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156116 + ... + 157157.

It is an arithmetic number, because the mean of its divisors is an integer number (40882257).

Almost surely, 2^163215233 is an apocalyptic number.

It is an amenable number.

163215233 is a deficient number, since it is larger than the sum of its proper divisors (313795).

163215233 is an equidigital number, since it uses as much as digits as its factorization.

163215233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313794.

The product of its digits is 3240, while the sum is 26.

The square root of 163215233 is about 12775.5717288895. The cubic root of 163215233 is about 546.4958853713.

Adding to 163215233 its reverse (332512361), we get a palindrome (495727594).

The spelling of 163215233 in words is "one hundred sixty-three million, two hundred fifteen thousand, two hundred thirty-three".