316215133 has 4 divisors (see below), whose sum is σ = 340539388. Its totient is φ = 291890880.

The previous prime is 316215121. The next prime is 316215169. The reversal of 316215133 is 331512613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331512613 = 61 ⋅5434633.

It can be written as a sum of positive squares in 2 ways, for example, as 98446084 + 217769049 = 9922^2 + 14757^2 .

It is a cyclic number.

It is not a de Polignac number, because 316215133 - 2¹³ = 316206941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 316215098 and 316215107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316215173) 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, 12162108 + ... + 12162133.

It is an arithmetic number, because the mean of its divisors is an integer number (85134847).

Almost surely, 2^316215133 is an apocalyptic number.

It is an amenable number.

316215133 is a deficient number, since it is larger than the sum of its proper divisors (24324255).

316215133 is a wasteful number, since it uses less digits than its factorization.

316215133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24324254.

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

The square root of 316215133 is about 17782.4388934702. The cubic root of 316215133 is about 681.2829966006.

Adding to 316215133 its reverse (331512613), we get a palindrome (647727746).

The spelling of 316215133 in words is "three hundred sixteen million, two hundred fifteen thousand, one hundred thirty-three".