312530133 has 4 divisors (see below), whose sum is σ = 416706848. Its totient is φ = 208353420.

The previous prime is 312530117. The next prime is 312530171. The reversal of 312530133 is 331035213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331035213 = 3 ⋅110345071.

It is not a de Polignac number, because 312530133 - 2⁴ = 312530117 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 (312530173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52088353 + ... + 52088358.

It is an arithmetic number, because the mean of its divisors is an integer number (104176712).

Almost surely, 2^312530133 is an apocalyptic number.

It is an amenable number.

312530133 is a deficient number, since it is larger than the sum of its proper divisors (104176715).

312530133 is a wasteful number, since it uses less digits than its factorization.

312530133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104176714.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 312530133 is about 17678.5217990645. The cubic root of 312530133 is about 678.6262150600.

Adding to 312530133 its reverse (331035213), we get a palindrome (643565346).

The spelling of 312530133 in words is "three hundred twelve million, five hundred thirty thousand, one hundred thirty-three".