133215163 has 4 divisors (see below), whose sum is σ = 133238248. Its totient is φ = 133192080.

The previous prime is 133215151. The next prime is 133215167. The reversal of 133215163 is 361512331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 361512331 = 1499 ⋅241169.

It is a cyclic number.

It is not a de Polignac number, because 133215163 - 2¹³ = 133206971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133215167) 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, 5695 + ... + 17287.

It is an arithmetic number, because the mean of its divisors is an integer number (33309562).

Almost surely, 2^133215163 is an apocalyptic number.

133215163 is a deficient number, since it is larger than the sum of its proper divisors (23085).

133215163 is a wasteful number, since it uses less digits than its factorization.

133215163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23084.

The product of its digits is 1620, while the sum is 25.

The square root of 133215163 is about 11541.8873240038. The cubic root of 133215163 is about 510.7219852515.

Adding to 133215163 its reverse (361512331), we get a palindrome (494727494).

It can be divided in two parts, 133 and 215163, that added together give a square (215296 = 464²).

The spelling of 133215163 in words is "one hundred thirty-three million, two hundred fifteen thousand, one hundred sixty-three".