312664521 has 8 divisors (see below), whose sum is σ = 448954240. Its totient is φ = 192408912.

The previous prime is 312664501. The next prime is 312664529. The reversal of 312664521 is 125466213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312664521 - 2⁵ = 312664489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312664529) 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 7 ways as a sum of consecutive naturals, for example, 4008481 + ... + 4008558.

It is an arithmetic number, because the mean of its divisors is an integer number (56119280).

Almost surely, 2^312664521 is an apocalyptic number.

It is an amenable number.

312664521 is a deficient number, since it is larger than the sum of its proper divisors (136289719).

312664521 is a wasteful number, since it uses less digits than its factorization.

312664521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8017055.

The product of its digits is 8640, while the sum is 30.

The square root of 312664521 is about 17682.3222739549. The cubic root of 312664521 is about 678.7234709098.

The spelling of 312664521 in words is "three hundred twelve million, six hundred sixty-four thousand, five hundred twenty-one".