312463521 has 16 divisors (see below), whose sum is σ = 466244800. Its totient is φ = 206807904.

The previous prime is 312463517. The next prime is 312463523. The reversal of 312463521 is 125364213.

312463521 is a `hidden beast` number, since 3 + 1 + 2 + 4 + 635 + 21 = 666.

It is not a de Polignac number, because 312463521 - 2² = 312463517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312463523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37876 + ... + 45381.

It is an arithmetic number, because the mean of its divisors is an integer number (29140300).

Almost surely, 2^312463521 is an apocalyptic number.

It is an amenable number.

312463521 is a deficient number, since it is larger than the sum of its proper divisors (153781279).

312463521 is a wasteful number, since it uses less digits than its factorization.

312463521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83405 (or 83399 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 312463521 is about 17676.6377176204. The cubic root of 312463521 is about 678.5779979905.

The spelling of 312463521 in words is "three hundred twelve million, four hundred sixty-three thousand, five hundred twenty-one".