313523213 has 4 divisors (see below), whose sum is σ = 314892540. Its totient is φ = 312153888.

The previous prime is 313523209. The next prime is 313523233. The reversal of 313523213 is 312325313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312325313 = 13219 ⋅23627.

It can be written as a sum of positive squares in 2 ways, for example, as 288252484 + 25270729 = 16978^2 + 5027^2 .

It is a cyclic number.

It is not a de Polignac number, because 313523213 - 2² = 313523209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313523233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684320 + ... + 684777.

It is an arithmetic number, because the mean of its divisors is an integer number (78723135).

Almost surely, 2^313523213 is an apocalyptic number.

It is an amenable number.

313523213 is a deficient number, since it is larger than the sum of its proper divisors (1369327).

313523213 is a wasteful number, since it uses less digits than its factorization.

313523213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369326.

The product of its digits is 1620, while the sum is 23.

The square root of 313523213 is about 17706.5867122944. The cubic root of 313523213 is about 679.3442445581.

Adding to 313523213 its reverse (312325313), we get a palindrome (625848526).

The spelling of 313523213 in words is "three hundred thirteen million, five hundred twenty-three thousand, two hundred thirteen".